Finding the Fourth Proportional to 34,947.40, 52,429 and 12,760.88

Step by Step Solution

1. Step 1: Write the proportion equation
   34,947.40 : 52,429 = 12,760.88 : x
2. Step 2: Convert to fraction form
   34,947.40/52,429 = 12,760.88/x
3. Step 3: Cross multiply
   34,947.40x = 52,429 × 12,760.88
4. Step 4: Simplify right side
   34,947.40x = 669,040,177.52
5. Step 5: Solve for x
   x = 669,040,177.52/34,947.40
6. Step 6: Final answer
   x = 19,144.20