Finding the Fourth Proportional to 112,139.40, 168,144.30 and 42,025.80

Step by Step Solution

1. Step 1: Write the proportion equation
   112,139.40 : 168,144.30 = 42,025.80 : x
2. Step 2: Convert to fraction form
   112,139.40/168,144.30 = 42,025.80/x
3. Step 3: Cross multiply
   112,139.40x = 168,144.30 × 42,025.80
4. Step 4: Simplify right side
   112,139.40x = 7,066,398,722.94
5. Step 5: Solve for x
   x = 7,066,398,722.94/112,139.40
6. Step 6: Final answer
   x = 63,014.42