Finding the Fourth Proportional to 58,665.78, 80,915.76 and 38,515.31

Step by Step Solution

1. Step 1: Write the proportion equation
   58,665.78 : 80,915.76 = 38,515.31 : x
2. Step 2: Convert to fraction form
   58,665.78/80,915.76 = 38,515.31/x
3. Step 3: Cross multiply
   58,665.78x = 80,915.76 × 38,515.31
4. Step 4: Simplify right side
   58,665.78x = 3,116,495,175.71
5. Step 5: Solve for x
   x = 3,116,495,175.71/58,665.78
6. Step 6: Final answer
   x = 53,122.88