Finding the Fourth Proportional to 9,123.67, 13,691.40 and 3,280.15

Step by Step Solution

1. Step 1: Write the proportion equation
   9,123.67 : 13,691.40 = 3,280.15 : x
2. Step 2: Convert to fraction form
   9,123.67/13,691.40 = 3,280.15/x
3. Step 3: Cross multiply
   9,123.67x = 13,691.40 × 3,280.15
4. Step 4: Simplify right side
   9,123.67x = 44,909,845.71
5. Step 5: Solve for x
   x = 44,909,845.71/9,123.67
6. Step 6: Final answer
   x = 4,922.34