Finding the Fourth Proportional to 1,354.24, 1,869.72 and 1,106.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,354.24 : 1,869.72 = 1,106.15 : x
2. Step 2: Convert to fraction form
   1,354.24/1,869.72 = 1,106.15/x
3. Step 3: Cross multiply
   1,354.24x = 1,869.72 × 1,106.15
4. Step 4: Simplify right side
   1,354.24x = 2,068,191.30
5. Step 5: Solve for x
   x = 2,068,191.30/1,354.24
6. Step 6: Final answer
   x = 1,527.20