Finding the Fourth Proportional to 72,375, 99,877.50 and 40,543.89

Step by Step Solution

1. Step 1: Write the proportion equation
   72,375 : 99,877.50 = 40,543.89 : x
2. Step 2: Convert to fraction form
   72,375/99,877.50 = 40,543.89/x
3. Step 3: Cross multiply
   72,375x = 99,877.50 × 40,543.89
4. Step 4: Simplify right side
   72,375x = 4,049,422,373.48
5. Step 5: Solve for x
   x = 4,049,422,373.48/72,375
6. Step 6: Final answer
   x = 55,950.57