Finding the Fourth Proportional to 12,912.48, 19,373.04 and 5,123.52

Step by Step Solution

1. Step 1: Write the proportion equation
   12,912.48 : 19,373.04 = 5,123.52 : x
2. Step 2: Convert to fraction form
   12,912.48/19,373.04 = 5,123.52/x
3. Step 3: Cross multiply
   12,912.48x = 19,373.04 × 5,123.52
4. Step 4: Simplify right side
   12,912.48x = 99,258,157.90
5. Step 5: Solve for x
   x = 99,258,157.90/12,912.48
6. Step 6: Final answer
   x = 7,686.99