Finding the Fourth Proportional to 42,118.64, 63,233.12 and 28,168.31

Step by Step Solution

1. Step 1: Write the proportion equation
   42,118.64 : 63,233.12 = 28,168.31 : x
2. Step 2: Convert to fraction form
   42,118.64/63,233.12 = 28,168.31/x
3. Step 3: Cross multiply
   42,118.64x = 63,233.12 × 28,168.31
4. Step 4: Simplify right side
   42,118.64x = 1,781,170,284.51
5. Step 5: Solve for x
   x = 1,781,170,284.51/42,118.64
6. Step 6: Final answer
   x = 42,289.36