Finding the Fourth Proportional to 112,298.46, 168,398.37 and 42,128.61

Step by Step Solution

1. Step 1: Write the proportion equation
   112,298.46 : 168,398.37 = 42,128.61 : x
2. Step 2: Convert to fraction form
   112,298.46/168,398.37 = 42,128.61/x
3. Step 3: Cross multiply
   112,298.46x = 168,398.37 × 42,128.61
4. Step 4: Simplify right side
   112,298.46x = 7,094,389,254.37
5. Step 5: Solve for x
   x = 7,094,389,254.37/112,298.46
6. Step 6: Final answer
   x = 63,174.41