Finding the Fourth Proportional to 72,112.96, 99,515.46 and 40,281.76

Step by Step Solution

1. Step 1: Write the proportion equation
   72,112.96 : 99,515.46 = 40,281.76 : x
2. Step 2: Convert to fraction form
   72,112.96/99,515.46 = 40,281.76/x
3. Step 3: Cross multiply
   72,112.96x = 99,515.46 × 40,281.76
4. Step 4: Simplify right side
   72,112.96x = 4,008,657,876.01
5. Step 5: Solve for x
   x = 4,008,657,876.01/72,112.96
6. Step 6: Final answer
   x = 55,588.59