Finding the Fourth Proportional to 112,608, 168,914.16 and 42,520.32

Step by Step Solution

1. Step 1: Write the proportion equation
   112,608 : 168,914.16 = 42,520.32 : x
2. Step 2: Convert to fraction form
   112,608/168,914.16 = 42,520.32/x
3. Step 3: Cross multiply
   112,608x = 168,914.16 × 42,520.32
4. Step 4: Simplify right side
   112,608x = 7,182,284,135.73
5. Step 5: Solve for x
   x = 7,182,284,135.73/112,608
6. Step 6: Final answer
   x = 63,781.30