Finding the Fourth Proportional to 1,146,146,111.80, 1,581,672,126.35 and 644,357,132.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,146,146,111.80 : 1,581,672,126.35 = 644,357,132.18 : x
2. Step 2: Convert to fraction form
   1,146,146,111.80/1,581,672,126.35 = 644,357,132.18/x
3. Step 3: Cross multiply
   1,146,146,111.80x = 1,581,672,126.35 × 644,357,132.18
4. Step 4: Simplify right side
   1,146,146,111.80x = 1,019,161,715,383,928,448
5. Step 5: Solve for x
   x = 1,019,161,715,383,928,448/1,146,146,111.80
6. Step 6: Final answer
   x = 889,207,497.10