Finding the Fourth Proportional to 67,280.62, 92,174.90 and 64,758.28

Step by Step Solution

1. Step 1: Write the proportion equation
   67,280.62 : 92,174.90 = 64,758.28 : x
2. Step 2: Convert to fraction form
   67,280.62/92,174.90 = 64,758.28/x
3. Step 3: Cross multiply
   67,280.62x = 92,174.90 × 64,758.28
4. Step 4: Simplify right side
   67,280.62x = 5,969,087,983.17
5. Step 5: Solve for x
   x = 5,969,087,983.17/67,280.62
6. Step 6: Final answer
   x = 88,719.28