Finding the Fourth Proportional to 99,875.53, 137,827.31 and 54,553.50

Step by Step Solution

1. Step 1: Write the proportion equation
   99,875.53 : 137,827.31 = 54,553.50 : x
2. Step 2: Convert to fraction form
   99,875.53/137,827.31 = 54,553.50/x
3. Step 3: Cross multiply
   99,875.53x = 137,827.31 × 54,553.50
4. Step 4: Simplify right side
   99,875.53x = 7,518,961,466.95
5. Step 5: Solve for x
   x = 7,518,961,466.95/99,875.53
6. Step 6: Final answer
   x = 75,283.32