Finding the Fourth Proportional to 428,307.82, 591,061.80 and 237,320.62

Step by Step Solution

1. Step 1: Write the proportion equation
   428,307.82 : 591,061.80 = 237,320.62 : x
2. Step 2: Convert to fraction form
   428,307.82/591,061.80 = 237,320.62/x
3. Step 3: Cross multiply
   428,307.82x = 591,061.80 × 237,320.62
4. Step 4: Simplify right side
   428,307.82x = 140,271,152,834.32
5. Step 5: Solve for x
   x = 140,271,152,834.32/428,307.82
6. Step 6: Final answer
   x = 327,500.80