Finding the Fourth Proportional to 105,309.72, 157,979.50 and 34,209.61

Step by Step Solution

1. Step 1: Write the proportion equation
   105,309.72 : 157,979.50 = 34,209.61 : x
2. Step 2: Convert to fraction form
   105,309.72/157,979.50 = 34,209.61/x
3. Step 3: Cross multiply
   105,309.72x = 157,979.50 × 34,209.61
4. Step 4: Simplify right side
   105,309.72x = 5,404,416,602.52
5. Step 5: Solve for x
   x = 5,404,416,602.52/105,309.72
6. Step 6: Final answer
   x = 51,319.26