Finding the Fourth Proportional to 112,311.57, 168,466.68 and 28,071.31

Step by Step Solution

1. Step 1: Write the proportion equation
   112,311.57 : 168,466.68 = 28,071.31 : x
2. Step 2: Convert to fraction form
   112,311.57/168,466.68 = 28,071.31/x
3. Step 3: Cross multiply
   112,311.57x = 168,466.68 × 28,071.31
4. Step 4: Simplify right side
   112,311.57x = 4,729,080,258.59
5. Step 5: Solve for x
   x = 4,729,080,258.59/112,311.57
6. Step 6: Final answer
   x = 42,106.80