Finding the Fourth Proportional to 72,207.56, 99,633.57 and 40,376.72

Step by Step Solution

1. Step 1: Write the proportion equation
   72,207.56 : 99,633.57 = 40,376.72 : x
2. Step 2: Convert to fraction form
   72,207.56/99,633.57 = 40,376.72/x
3. Step 3: Cross multiply
   72,207.56x = 99,633.57 × 40,376.72
4. Step 4: Simplify right side
   72,207.56x = 4,022,876,758.49
5. Step 5: Solve for x
   x = 4,022,876,758.49/72,207.56
6. Step 6: Final answer
   x = 55,712.68