Finding the Fourth Proportional to 42,640.83, 58,812.62 and 31,306.77

Step by Step Solution

1. Step 1: Write the proportion equation
   42,640.83 : 58,812.62 = 31,306.77 : x
2. Step 2: Convert to fraction form
   42,640.83/58,812.62 = 31,306.77/x
3. Step 3: Cross multiply
   42,640.83x = 58,812.62 × 31,306.77
4. Step 4: Simplify right side
   42,640.83x = 1,841,233,010.90
5. Step 5: Solve for x
   x = 1,841,233,010.90/42,640.83
6. Step 6: Final answer
   x = 43,180.05