Finding the Fourth Proportional to 42,288.72, 63,434.11 and 14,209.18

Step by Step Solution

1. Step 1: Write the proportion equation
   42,288.72 : 63,434.11 = 14,209.18 : x
2. Step 2: Convert to fraction form
   42,288.72/63,434.11 = 14,209.18/x
3. Step 3: Cross multiply
   42,288.72x = 63,434.11 × 14,209.18
4. Step 4: Simplify right side
   42,288.72x = 901,346,514.31
5. Step 5: Solve for x
   x = 901,346,514.31/42,288.72
6. Step 6: Final answer
   x = 21,314.11