Finding the Fourth Proportional to 85,422.77, 128,061.24 and 60,384.05

Step by Step Solution

1. Step 1: Write the proportion equation
   85,422.77 : 128,061.24 = 60,384.05 : x
2. Step 2: Convert to fraction form
   85,422.77/128,061.24 = 60,384.05/x
3. Step 3: Cross multiply
   85,422.77x = 128,061.24 × 60,384.05
4. Step 4: Simplify right side
   85,422.77x = 7,732,855,932.71
5. Step 5: Solve for x
   x = 7,732,855,932.71/85,422.77
6. Step 6: Final answer
   x = 90,524.53