Finding the Fourth Proportional to 127,020.31, 175,143.49 and 103,976.83

Step by Step Solution

1. Step 1: Write the proportion equation
   127,020.31 : 175,143.49 = 103,976.83 : x
2. Step 2: Convert to fraction form
   127,020.31/175,143.49 = 103,976.83/x
3. Step 3: Cross multiply
   127,020.31x = 175,143.49 × 103,976.83
4. Step 4: Simplify right side
   127,020.31x = 18,210,864,885.34
5. Step 5: Solve for x
   x = 18,210,864,885.34/127,020.31
6. Step 6: Final answer
   x = 143,369.71