Finding the Fourth Proportional to 1,680.01, 2,521.33 and 900.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,680.01 : 2,521.33 = 900.86 : x
2. Step 2: Convert to fraction form
   1,680.01/2,521.33 = 900.86/x
3. Step 3: Cross multiply
   1,680.01x = 2,521.33 × 900.86
4. Step 4: Simplify right side
   1,680.01x = 2,271,350.49
5. Step 5: Solve for x
   x = 2,271,350.49/1,680.01
6. Step 6: Final answer
   x = 1,351.99