Finding the Fourth Proportional to 1,146,146,113.61, 1,581,672,128.82 and 644,357,133.99

Step by Step Solution

1. Step 1: Write the proportion equation
   1,146,146,113.61 : 1,581,672,128.82 = 644,357,133.99 : x
2. Step 2: Convert to fraction form
   1,146,146,113.61/1,581,672,128.82 = 644,357,133.99/x
3. Step 3: Cross multiply
   1,146,146,113.61x = 1,581,672,128.82 × 644,357,133.99
4. Step 4: Simplify right side
   1,146,146,113.61x = 1,019,161,719,838,317,312
5. Step 5: Solve for x
   x = 1,019,161,719,838,317,312/1,146,146,113.61
6. Step 6: Final answer
   x = 889,207,499.59