Finding the Fourth Proportional to 72,327.39, 99,820.34 and 40,490.15

Step by Step Solution

1. Step 1: Write the proportion equation
   72,327.39 : 99,820.34 = 40,490.15 : x
2. Step 2: Convert to fraction form
   72,327.39/99,820.34 = 40,490.15/x
3. Step 3: Cross multiply
   72,327.39x = 99,820.34 × 40,490.15
4. Step 4: Simplify right side
   72,327.39x = 4,041,739,838.10
5. Step 5: Solve for x
   x = 4,041,739,838.10/72,327.39
6. Step 6: Final answer
   x = 55,881.18