Finding the Fourth Proportional to 115,538.10, 172,923.15 and 83,858.10

Step by Step Solution

1. Step 1: Write the proportion equation
   115,538.10 : 172,923.15 = 83,858.10 : x
2. Step 2: Convert to fraction form
   115,538.10/172,923.15 = 83,858.10/x
3. Step 3: Cross multiply
   115,538.10x = 172,923.15 × 83,858.10
4. Step 4: Simplify right side
   115,538.10x = 14,501,006,805.02
5. Step 5: Solve for x
   x = 14,501,006,805.02/115,538.10
6. Step 6: Final answer
   x = 125,508.44