Finding the Fourth Proportional to 42,142.79, 63,218.63 and 14,053.05

Step by Step Solution

1. Step 1: Write the proportion equation
   42,142.79 : 63,218.63 = 14,053.05 : x
2. Step 2: Convert to fraction form
   42,142.79/63,218.63 = 14,053.05/x
3. Step 3: Cross multiply
   42,142.79x = 63,218.63 × 14,053.05
4. Step 4: Simplify right side
   42,142.79x = 888,414,498.06
5. Step 5: Solve for x
   x = 888,414,498.06/42,142.79
6. Step 6: Final answer
   x = 21,081.06