Finding the Fourth Proportional to 12,969.18, 19,435.50 and 7,414.20

Step by Step Solution

1. Step 1: Write the proportion equation
   12,969.18 : 19,435.50 = 7,414.20 : x
2. Step 2: Convert to fraction form
   12,969.18/19,435.50 = 7,414.20/x
3. Step 3: Cross multiply
   12,969.18x = 19,435.50 × 7,414.20
4. Step 4: Simplify right side
   12,969.18x = 144,098,684.10
5. Step 5: Solve for x
   x = 144,098,684.10/12,969.18
6. Step 6: Final answer
   x = 11,110.86