Finding the Fourth Proportional to 72,362.47, 99,857.31 and 40,529.74

Step by Step Solution

1. Step 1: Write the proportion equation
   72,362.47 : 99,857.31 = 40,529.74 : x
2. Step 2: Convert to fraction form
   72,362.47/99,857.31 = 40,529.74/x
3. Step 3: Cross multiply
   72,362.47x = 99,857.31 × 40,529.74
4. Step 4: Simplify right side
   72,362.47x = 4,047,190,811.40
5. Step 5: Solve for x
   x = 4,047,190,811.40/72,362.47
6. Step 6: Final answer
   x = 55,929.42