Finding the Fourth Proportional to 12,705.18, 17,534.24 and 7,400.49

Step by Step Solution

1. Step 1: Write the proportion equation
   12,705.18 : 17,534.24 = 7,400.49 : x
2. Step 2: Convert to fraction form
   12,705.18/17,534.24 = 7,400.49/x
3. Step 3: Cross multiply
   12,705.18x = 17,534.24 × 7,400.49
4. Step 4: Simplify right side
   12,705.18x = 129,761,967.78
5. Step 5: Solve for x
   x = 129,761,967.78/12,705.18
6. Step 6: Final answer
   x = 10,213.31