Finding the Fourth Proportional to 123,417.35, 170,328.52 and 88,990.41

Step by Step Solution

1. Step 1: Write the proportion equation
   123,417.35 : 170,328.52 = 88,990.41 : x
2. Step 2: Convert to fraction form
   123,417.35/170,328.52 = 88,990.41/x
3. Step 3: Cross multiply
   123,417.35x = 170,328.52 × 88,990.41
4. Step 4: Simplify right side
   123,417.35x = 15,157,604,142.32
5. Step 5: Solve for x
   x = 15,157,604,142.32/123,417.35
6. Step 6: Final answer
   x = 122,815.82