Finding the Fourth Proportional to 42,117.87, 63,176.55 and 10,527.78

Step by Step Solution

1. Step 1: Write the proportion equation
   42,117.87 : 63,176.55 = 10,527.78 : x
2. Step 2: Convert to fraction form
   42,117.87/63,176.55 = 10,527.78/x
3. Step 3: Cross multiply
   42,117.87x = 63,176.55 × 10,527.78
4. Step 4: Simplify right side
   42,117.87x = 665,108,819.56
5. Step 5: Solve for x
   x = 665,108,819.56/42,117.87
6. Step 6: Final answer
   x = 15,791.61