Finding the Fourth Proportional to 113,670.42, 170,452.98 and 42,540.32

Step by Step Solution

1. Step 1: Write the proportion equation
   113,670.42 : 170,452.98 = 42,540.32 : x
2. Step 2: Convert to fraction form
   113,670.42/170,452.98 = 42,540.32/x
3. Step 3: Cross multiply
   113,670.42x = 170,452.98 × 42,540.32
4. Step 4: Simplify right side
   113,670.42x = 7,251,123,461.89
5. Step 5: Solve for x
   x = 7,251,123,461.89/113,670.42
6. Step 6: Final answer
   x = 63,790.77