Finding the Fourth Proportional to 112,364.88, 168,443.16 and 42,290.64

Step by Step Solution

1. Step 1: Write the proportion equation
   112,364.88 : 168,443.16 = 42,290.64 : x
2. Step 2: Convert to fraction form
   112,364.88/168,443.16 = 42,290.64/x
3. Step 3: Cross multiply
   112,364.88x = 168,443.16 × 42,290.64
4. Step 4: Simplify right side
   112,364.88x = 7,123,569,040.02
5. Step 5: Solve for x
   x = 7,123,569,040.02/112,364.88
6. Step 6: Final answer
   x = 63,396.76