Finding the Fourth Proportional to 871,320.32, 1,307,061.12 and 338,881.76

Step by Step Solution

1. Step 1: Write the proportion equation
   871,320.32 : 1,307,061.12 = 338,881.76 : x
2. Step 2: Convert to fraction form
   871,320.32/1,307,061.12 = 338,881.76/x
3. Step 3: Cross multiply
   871,320.32x = 1,307,061.12 × 338,881.76
4. Step 4: Simplify right side
   871,320.32x = 442,939,172,773.17
5. Step 5: Solve for x
   x = 442,939,172,773.17/871,320.32
6. Step 6: Final answer
   x = 508,354.00