Finding the Fourth Proportional to 105,540.06, 158,354.06 and 42,405.06

Step by Step Solution

1. Step 1: Write the proportion equation
   105,540.06 : 158,354.06 = 42,405.06 : x
2. Step 2: Convert to fraction form
   105,540.06/158,354.06 = 42,405.06/x
3. Step 3: Cross multiply
   105,540.06x = 158,354.06 × 42,405.06
4. Step 4: Simplify right side
   105,540.06x = 6,715,013,041.71
5. Step 5: Solve for x
   x = 6,715,013,041.71/105,540.06
6. Step 6: Final answer
   x = 63,625.25