Finding the Fourth Proportional to 42,143.35, 63,227.71 and 12,561.18

Step by Step Solution

1. Step 1: Write the proportion equation
   42,143.35 : 63,227.71 = 12,561.18 : x
2. Step 2: Convert to fraction form
   42,143.35/63,227.71 = 12,561.18/x
3. Step 3: Cross multiply
   42,143.35x = 63,227.71 × 12,561.18
4. Step 4: Simplify right side
   42,143.35x = 794,214,899.10
5. Step 5: Solve for x
   x = 794,214,899.10/42,143.35
6. Step 6: Final answer
   x = 18,845.56