Finding the Fourth Proportional to 105,686.79, 158,442.35 and 49,499.43

Step by Step Solution

1. Step 1: Write the proportion equation
   105,686.79 : 158,442.35 = 49,499.43 : x
2. Step 2: Convert to fraction form
   105,686.79/158,442.35 = 49,499.43/x
3. Step 3: Cross multiply
   105,686.79x = 158,442.35 × 49,499.43
4. Step 4: Simplify right side
   105,686.79x = 7,842,805,765.36
5. Step 5: Solve for x
   x = 7,842,805,765.36/105,686.79
6. Step 6: Final answer
   x = 74,208.00