Finding the Fourth Proportional to 112,139.15, 168,175.71 and 42,002.06

Step by Step Solution

1. Step 1: Write the proportion equation
   112,139.15 : 168,175.71 = 42,002.06 : x
2. Step 2: Convert to fraction form
   112,139.15/168,175.71 = 42,002.06/x
3. Step 3: Cross multiply
   112,139.15x = 168,175.71 × 42,002.06
4. Step 4: Simplify right side
   112,139.15x = 7,063,725,421.08
5. Step 5: Solve for x
   x = 7,063,725,421.08/112,139.15
6. Step 6: Final answer
   x = 62,990.72