Finding the Fourth Proportional to 1,354.50, 1,864.35 and 1,207.08

Step by Step Solution

1. Step 1: Write the proportion equation
   1,354.50 : 1,864.35 = 1,207.08 : x
2. Step 2: Convert to fraction form
   1,354.50/1,864.35 = 1,207.08/x
3. Step 3: Cross multiply
   1,354.50x = 1,864.35 × 1,207.08
4. Step 4: Simplify right side
   1,354.50x = 2,250,419.60
5. Step 5: Solve for x
   x = 2,250,419.60/1,354.50
6. Step 6: Final answer
   x = 1,661.44