Finding the Fourth Proportional to 72,154.86, 99,573.38 and 40,323.74

Step by Step Solution

1. Step 1: Write the proportion equation
   72,154.86 : 99,573.38 = 40,323.74 : x
2. Step 2: Convert to fraction form
   72,154.86/99,573.38 = 40,323.74/x
3. Step 3: Cross multiply
   72,154.86x = 99,573.38 × 40,323.74
4. Step 4: Simplify right side
   72,154.86x = 4,015,171,086.04
5. Step 5: Solve for x
   x = 4,015,171,086.04/72,154.86
6. Step 6: Final answer
   x = 55,646.58