Finding the Fourth Proportional to 81,632.80, 122,514.72 and 42,201.40

Step by Step Solution

1. Step 1: Write the proportion equation
   81,632.80 : 122,514.72 = 42,201.40 : x
2. Step 2: Convert to fraction form
   81,632.80/122,514.72 = 42,201.40/x
3. Step 3: Cross multiply
   81,632.80x = 122,514.72 × 42,201.40
4. Step 4: Simplify right side
   81,632.80x = 5,170,292,704.61
5. Step 5: Solve for x
   x = 5,170,292,704.61/81,632.80
6. Step 6: Final answer
   x = 63,335.97