Finding the Fourth Proportional to 12,719.58, 17,552.06 and 7,129.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,719.58 : 17,552.06 = 7,129.50 : x
2. Step 2: Convert to fraction form
   12,719.58/17,552.06 = 7,129.50/x
3. Step 3: Cross multiply
   12,719.58x = 17,552.06 × 7,129.50
4. Step 4: Simplify right side
   12,719.58x = 125,137,411.77
5. Step 5: Solve for x
   x = 125,137,411.77/12,719.58
6. Step 6: Final answer
   x = 9,838.17