Finding the Fourth Proportional to 123,210.42, 170,017.74 and 90,962.16

Step by Step Solution

1. Step 1: Write the proportion equation
   123,210.42 : 170,017.74 = 90,962.16 : x
2. Step 2: Convert to fraction form
   123,210.42/170,017.74 = 90,962.16/x
3. Step 3: Cross multiply
   123,210.42x = 170,017.74 × 90,962.16
4. Step 4: Simplify right side
   123,210.42x = 15,465,180,868.72
5. Step 5: Solve for x
   x = 15,465,180,868.72/123,210.42
6. Step 6: Final answer
   x = 125,518.45