Finding the Fourth Proportional to 12,748.86, 19,123.20 and 7,551

Step by Step Solution

1. Step 1: Write the proportion equation
   12,748.86 : 19,123.20 = 7,551 : x
2. Step 2: Convert to fraction form
   12,748.86/19,123.20 = 7,551/x
3. Step 3: Cross multiply
   12,748.86x = 19,123.20 × 7,551
4. Step 4: Simplify right side
   12,748.86x = 144,399,283.20
5. Step 5: Solve for x
   x = 144,399,283.20/12,748.86
6. Step 6: Final answer
   x = 11,326.45