Finding the Fourth Proportional to 42,320.12, 63,355.56 and 31,276.04

Step by Step Solution

1. Step 1: Write the proportion equation
   42,320.12 : 63,355.56 = 31,276.04 : x
2. Step 2: Convert to fraction form
   42,320.12/63,355.56 = 31,276.04/x
3. Step 3: Cross multiply
   42,320.12x = 63,355.56 × 31,276.04
4. Step 4: Simplify right side
   42,320.12x = 1,981,510,712.00
5. Step 5: Solve for x
   x = 1,981,510,712.00/42,320.12
6. Step 6: Final answer
   x = 46,821.96