Finding the Fourth Proportional to 72,095.12, 99,490.56 and 40,263.20

Step by Step Solution

1. Step 1: Write the proportion equation
   72,095.12 : 99,490.56 = 40,263.20 : x
2. Step 2: Convert to fraction form
   72,095.12/99,490.56 = 40,263.20/x
3. Step 3: Cross multiply
   72,095.12x = 99,490.56 × 40,263.20
4. Step 4: Simplify right side
   72,095.12x = 4,005,808,315.39
5. Step 5: Solve for x
   x = 4,005,808,315.39/72,095.12
6. Step 6: Final answer
   x = 55,562.82