Finding the Fourth Proportional to 1,669.34, 2,499.35 and 1,085.01

Step by Step Solution

1. Step 1: Write the proportion equation
   1,669.34 : 2,499.35 = 1,085.01 : x
2. Step 2: Convert to fraction form
   1,669.34/2,499.35 = 1,085.01/x
3. Step 3: Cross multiply
   1,669.34x = 2,499.35 × 1,085.01
4. Step 4: Simplify right side
   1,669.34x = 2,711,814.32
5. Step 5: Solve for x
   x = 2,711,814.32/1,669.34
6. Step 6: Final answer
   x = 1,624.49