Finding the Fourth Proportional to 53,755.72, 74,148.62 and 42,421.59

Step by Step Solution

1. Step 1: Write the proportion equation
   53,755.72 : 74,148.62 = 42,421.59 : x
2. Step 2: Convert to fraction form
   53,755.72/74,148.62 = 42,421.59/x
3. Step 3: Cross multiply
   53,755.72x = 74,148.62 × 42,421.59
4. Step 4: Simplify right side
   53,755.72x = 3,145,502,144.60
5. Step 5: Solve for x
   x = 3,145,502,144.60/53,755.72
6. Step 6: Final answer
   x = 58,514.75