Finding the Fourth Proportional to 123,354.99, 170,176.80 and 72,383.31

Step by Step Solution

1. Step 1: Write the proportion equation
   123,354.99 : 170,176.80 = 72,383.31 : x
2. Step 2: Convert to fraction form
   123,354.99/170,176.80 = 72,383.31/x
3. Step 3: Cross multiply
   123,354.99x = 170,176.80 × 72,383.31
4. Step 4: Simplify right side
   123,354.99x = 12,317,960,250.17
5. Step 5: Solve for x
   x = 12,317,960,250.17/123,354.99
6. Step 6: Final answer
   x = 99,857.82