Finding the Fourth Proportional to 57,510.26, 79,407.42 and 56,591.72

Step by Step Solution

1. Step 1: Write the proportion equation
   57,510.26 : 79,407.42 = 56,591.72 : x
2. Step 2: Convert to fraction form
   57,510.26/79,407.42 = 56,591.72/x
3. Step 3: Cross multiply
   57,510.26x = 79,407.42 × 56,591.72
4. Step 4: Simplify right side
   57,510.26x = 4,493,802,478.56
5. Step 5: Solve for x
   x = 4,493,802,478.56/57,510.26
6. Step 6: Final answer
   x = 78,139.14