Finding the Fourth Proportional to 52,391.57, 78,586.59 and 12,948.69

Step by Step Solution

1. Step 1: Write the proportion equation
   52,391.57 : 78,586.59 = 12,948.69 : x
2. Step 2: Convert to fraction form
   52,391.57/78,586.59 = 12,948.69/x
3. Step 3: Cross multiply
   52,391.57x = 78,586.59 × 12,948.69
4. Step 4: Simplify right side
   52,391.57x = 1,017,592,934.39
5. Step 5: Solve for x
   x = 1,017,592,934.39/52,391.57
6. Step 6: Final answer
   x = 19,422.84