Finding the Fourth Proportional to 8,934.38, 12,321.38 and 5,577.50

Step by Step Solution

1. Step 1: Write the proportion equation
   8,934.38 : 12,321.38 = 5,577.50 : x
2. Step 2: Convert to fraction form
   8,934.38/12,321.38 = 5,577.50/x
3. Step 3: Cross multiply
   8,934.38x = 12,321.38 × 5,577.50
4. Step 4: Simplify right side
   8,934.38x = 68,722,407.46
5. Step 5: Solve for x
   x = 68,722,407.46/8,934.38
6. Step 6: Final answer
   x = 7,691.91