Finding the Fourth Proportional to 72,238.32, 99,683.47 and 40,401.07

Step by Step Solution

1. Step 1: Write the proportion equation
   72,238.32 : 99,683.47 = 40,401.07 : x
2. Step 2: Convert to fraction form
   72,238.32/99,683.47 = 40,401.07/x
3. Step 3: Cross multiply
   72,238.32x = 99,683.47 × 40,401.07
4. Step 4: Simplify right side
   72,238.32x = 4,027,318,987.78
5. Step 5: Solve for x
   x = 4,027,318,987.78/72,238.32
6. Step 6: Final answer
   x = 55,750.45