Finding the Fourth Proportional to 72,416.05, 99,940.04 and 40,153.86

Step by Step Solution

1. Step 1: Write the proportion equation
   72,416.05 : 99,940.04 = 40,153.86 : x
2. Step 2: Convert to fraction form
   72,416.05/99,940.04 = 40,153.86/x
3. Step 3: Cross multiply
   72,416.05x = 99,940.04 × 40,153.86
4. Step 4: Simplify right side
   72,416.05x = 4,012,978,374.55
5. Step 5: Solve for x
   x = 4,012,978,374.55/72,416.05
6. Step 6: Final answer
   x = 55,415.59