Finding the Fourth Proportional to 1,008,978.12, 1,513,472.58 and 299,012.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,008,978.12 : 1,513,472.58 = 299,012.31 : x
2. Step 2: Convert to fraction form
   1,008,978.12/1,513,472.58 = 299,012.31/x
3. Step 3: Cross multiply
   1,008,978.12x = 1,513,472.58 × 299,012.31
4. Step 4: Simplify right side
   1,008,978.12x = 452,546,932,267.46
5. Step 5: Solve for x
   x = 452,546,932,267.46/1,008,978.12
6. Step 6: Final answer
   x = 448,520.07