Finding the Fourth Proportional to 56,679.50, 78,217.72 and 31,529

Step by Step Solution

1. Step 1: Write the proportion equation
   56,679.50 : 78,217.72 = 31,529 : x
2. Step 2: Convert to fraction form
   56,679.50/78,217.72 = 31,529/x
3. Step 3: Cross multiply
   56,679.50x = 78,217.72 × 31,529
4. Step 4: Simplify right side
   56,679.50x = 2,466,126,493.88
5. Step 5: Solve for x
   x = 2,466,126,493.88/56,679.50
6. Step 6: Final answer
   x = 43,510.03