Finding the Fourth Proportional to 12,427.60, 17,151.06 and 7,123.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,427.60 : 17,151.06 = 7,123.72 : x
2. Step 2: Convert to fraction form
   12,427.60/17,151.06 = 7,123.72/x
3. Step 3: Cross multiply
   12,427.60x = 17,151.06 × 7,123.72
4. Step 4: Simplify right side
   12,427.60x = 122,179,349.14
5. Step 5: Solve for x
   x = 122,179,349.14/12,427.60
6. Step 6: Final answer
   x = 9,831.29