Finding the Fourth Proportional to 293,156.72, 439,736.12 and 71,540.72

Step by Step Solution

1. Step 1: Write the proportion equation
   293,156.72 : 439,736.12 = 71,540.72 : x
2. Step 2: Convert to fraction form
   293,156.72/439,736.12 = 71,540.72/x
3. Step 3: Cross multiply
   293,156.72x = 439,736.12 × 71,540.72
4. Step 4: Simplify right side
   293,156.72x = 31,459,038,634.81
5. Step 5: Solve for x
   x = 31,459,038,634.81/293,156.72
6. Step 6: Final answer
   x = 107,311.33