Finding the Fourth Proportional to 42,111.20, 63,161.90 and 10,948.88

Step by Step Solution

1. Step 1: Write the proportion equation
   42,111.20 : 63,161.90 = 10,948.88 : x
2. Step 2: Convert to fraction form
   42,111.20/63,161.90 = 10,948.88/x
3. Step 3: Cross multiply
   42,111.20x = 63,161.90 × 10,948.88
4. Step 4: Simplify right side
   42,111.20x = 691,552,063.67
5. Step 5: Solve for x
   x = 691,552,063.67/42,111.20
6. Step 6: Final answer
   x = 16,422.05