Finding the Fourth Proportional to 60,900.86, 84,411.69 and 57,396.87

Step by Step Solution

1. Step 1: Write the proportion equation
   60,900.86 : 84,411.69 = 57,396.87 : x
2. Step 2: Convert to fraction form
   60,900.86/84,411.69 = 57,396.87/x
3. Step 3: Cross multiply
   60,900.86x = 84,411.69 × 57,396.87
4. Step 4: Simplify right side
   60,900.86x = 4,844,966,582.17
5. Step 5: Solve for x
   x = 4,844,966,582.17/60,900.86
6. Step 6: Final answer
   x = 79,554.97