Finding the Fourth Proportional to 53,543.79, 80,348.49 and 42,488.55

Step by Step Solution

1. Step 1: Write the proportion equation
   53,543.79 : 80,348.49 = 42,488.55 : x
2. Step 2: Convert to fraction form
   53,543.79/80,348.49 = 42,488.55/x
3. Step 3: Cross multiply
   53,543.79x = 80,348.49 × 42,488.55
4. Step 4: Simplify right side
   53,543.79x = 3,413,890,834.79
5. Step 5: Solve for x
   x = 3,413,890,834.79/53,543.79
6. Step 6: Final answer
   x = 63,758.86