Finding the Fourth Proportional to 123,021.02, 169,781.55 and 75,305.90

Step by Step Solution

1. Step 1: Write the proportion equation
   123,021.02 : 169,781.55 = 75,305.90 : x
2. Step 2: Convert to fraction form
   123,021.02/169,781.55 = 75,305.90/x
3. Step 3: Cross multiply
   123,021.02x = 169,781.55 × 75,305.90
4. Step 4: Simplify right side
   123,021.02x = 12,785,552,426.15
5. Step 5: Solve for x
   x = 12,785,552,426.15/123,021.02
6. Step 6: Final answer
   x = 103,929.82