Finding the Fourth Proportional to 105,242.09, 157,915.90 and 49,086.61

Step by Step Solution

1. Step 1: Write the proportion equation
   105,242.09 : 157,915.90 = 49,086.61 : x
2. Step 2: Convert to fraction form
   105,242.09/157,915.90 = 49,086.61/x
3. Step 3: Cross multiply
   105,242.09x = 157,915.90 × 49,086.61
4. Step 4: Simplify right side
   105,242.09x = 7,751,556,000.72
5. Step 5: Solve for x
   x = 7,751,556,000.72/105,242.09
6. Step 6: Final answer
   x = 73,654.53