Finding the Fourth Proportional to 59,790.72, 89,547.84 and 57,717.12

Step by Step Solution

1. Step 1: Write the proportion equation
   59,790.72 : 89,547.84 = 57,717.12 : x
2. Step 2: Convert to fraction form
   59,790.72/89,547.84 = 57,717.12/x
3. Step 3: Cross multiply
   59,790.72x = 89,547.84 × 57,717.12
4. Step 4: Simplify right side
   59,790.72x = 5,168,443,427.02
5. Step 5: Solve for x
   x = 5,168,443,427.02/59,790.72
6. Step 6: Final answer
   x = 86,442.23