Finding the Fourth Proportional to 13,377.42, 18,459.10 and 7,712.39

Step by Step Solution

1. Step 1: Write the proportion equation
   13,377.42 : 18,459.10 = 7,712.39 : x
2. Step 2: Convert to fraction form
   13,377.42/18,459.10 = 7,712.39/x
3. Step 3: Cross multiply
   13,377.42x = 18,459.10 × 7,712.39
4. Step 4: Simplify right side
   13,377.42x = 142,363,695.59
5. Step 5: Solve for x
   x = 142,363,695.59/13,377.42
6. Step 6: Final answer
   x = 10,642.09