Finding the Fourth Proportional to 58,696.78, 81,001.59 and 31,839.20

Step by Step Solution

1. Step 1: Write the proportion equation
   58,696.78 : 81,001.59 = 31,839.20 : x
2. Step 2: Convert to fraction form
   58,696.78/81,001.59 = 31,839.20/x
3. Step 3: Cross multiply
   58,696.78x = 81,001.59 × 31,839.20
4. Step 4: Simplify right side
   58,696.78x = 2,579,025,824.33
5. Step 5: Solve for x
   x = 2,579,025,824.33/58,696.78
6. Step 6: Final answer
   x = 43,938.12