Finding the Fourth Proportional to 34,378.15, 51,572.17 and 13,038.72

Step by Step Solution

1. Step 1: Write the proportion equation
   34,378.15 : 51,572.17 = 13,038.72 : x
2. Step 2: Convert to fraction form
   34,378.15/51,572.17 = 13,038.72/x
3. Step 3: Cross multiply
   34,378.15x = 51,572.17 × 13,038.72
4. Step 4: Simplify right side
   34,378.15x = 672,435,084.42
5. Step 5: Solve for x
   x = 672,435,084.42/34,378.15
6. Step 6: Final answer
   x = 19,559.96