Finding the Fourth Proportional to 12,969.23, 19,439.27 and 5,577.17

Step by Step Solution

1. Step 1: Write the proportion equation
   12,969.23 : 19,439.27 = 5,577.17 : x
2. Step 2: Convert to fraction form
   12,969.23/19,439.27 = 5,577.17/x
3. Step 3: Cross multiply
   12,969.23x = 19,439.27 × 5,577.17
4. Step 4: Simplify right side
   12,969.23x = 108,416,085.58
5. Step 5: Solve for x
   x = 108,416,085.58/12,969.23
6. Step 6: Final answer
   x = 8,359.49