Finding the Fourth Proportional to 72,257.34, 99,715.24 and 40,426.86

Step by Step Solution

1. Step 1: Write the proportion equation
   72,257.34 : 99,715.24 = 40,426.86 : x
2. Step 2: Convert to fraction form
   72,257.34/99,715.24 = 40,426.86/x
3. Step 3: Cross multiply
   72,257.34x = 99,715.24 × 40,426.86
4. Step 4: Simplify right side
   72,257.34x = 4,031,174,047.35
5. Step 5: Solve for x
   x = 4,031,174,047.35/72,257.34
6. Step 6: Final answer
   x = 55,789.13