Finding the Fourth Proportional to 12,357.18, 18,502.29 and 7,087.59

Step by Step Solution

1. Step 1: Write the proportion equation
   12,357.18 : 18,502.29 = 7,087.59 : x
2. Step 2: Convert to fraction form
   12,357.18/18,502.29 = 7,087.59/x
3. Step 3: Cross multiply
   12,357.18x = 18,502.29 × 7,087.59
4. Step 4: Simplify right side
   12,357.18x = 131,136,645.58
5. Step 5: Solve for x
   x = 131,136,645.58/12,357.18
6. Step 6: Final answer
   x = 10,612.18