Finding the Fourth Proportional to 123,513.63, 170,429.44 and 71,842.17

Step by Step Solution

1. Step 1: Write the proportion equation
   123,513.63 : 170,429.44 = 71,842.17 : x
2. Step 2: Convert to fraction form
   123,513.63/170,429.44 = 71,842.17/x
3. Step 3: Cross multiply
   123,513.63x = 170,429.44 × 71,842.17
4. Step 4: Simplify right side
   123,513.63x = 12,244,020,801.48
5. Step 5: Solve for x
   x = 12,244,020,801.48/123,513.63
6. Step 6: Final answer
   x = 99,130.93