Finding the Fourth Proportional to 105,787.50, 158,687.73 and 31,915.50

Step by Step Solution

1. Step 1: Write the proportion equation
   105,787.50 : 158,687.73 = 31,915.50 : x
2. Step 2: Convert to fraction form
   105,787.50/158,687.73 = 31,915.50/x
3. Step 3: Cross multiply
   105,787.50x = 158,687.73 × 31,915.50
4. Step 4: Simplify right side
   105,787.50x = 5,064,598,246.82
5. Step 5: Solve for x
   x = 5,064,598,246.82/105,787.50
6. Step 6: Final answer
   x = 47,875.20