Finding the Fourth Proportional to 60,729.81, 91,557.17 and 56,448.77

Step by Step Solution

1. Step 1: Write the proportion equation
   60,729.81 : 91,557.17 = 56,448.77 : x
2. Step 2: Convert to fraction form
   60,729.81/91,557.17 = 56,448.77/x
3. Step 3: Cross multiply
   60,729.81x = 91,557.17 × 56,448.77
4. Step 4: Simplify right side
   60,729.81x = 5,168,288,891.15
5. Step 5: Solve for x
   x = 5,168,288,891.15/60,729.81
6. Step 6: Final answer
   x = 85,103.00