Finding the Fourth Proportional to 112,218.90, 168,250.59 and 42,079.38

Step by Step Solution

1. Step 1: Write the proportion equation
   112,218.90 : 168,250.59 = 42,079.38 : x
2. Step 2: Convert to fraction form
   112,218.90/168,250.59 = 42,079.38/x
3. Step 3: Cross multiply
   112,218.90x = 168,250.59 × 42,079.38
4. Step 4: Simplify right side
   112,218.90x = 7,079,880,511.83
5. Step 5: Solve for x
   x = 7,079,880,511.83/112,218.90
6. Step 6: Final answer
   x = 63,089.91