Finding the Fourth Proportional to 1,610.08, 2,221.80 and 901.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,610.08 : 2,221.80 = 901.89 : x
2. Step 2: Convert to fraction form
   1,610.08/2,221.80 = 901.89/x
3. Step 3: Cross multiply
   1,610.08x = 2,221.80 × 901.89
4. Step 4: Simplify right side
   1,610.08x = 2,003,819.20
5. Step 5: Solve for x
   x = 2,003,819.20/1,610.08
6. Step 6: Final answer
   x = 1,244.55