Finding the Fourth Proportional to 1,948.10, 2,688.61 and 1,109.08

Step by Step Solution

1. Step 1: Write the proportion equation
   1,948.10 : 2,688.61 = 1,109.08 : x
2. Step 2: Convert to fraction form
   1,948.10/2,688.61 = 1,109.08/x
3. Step 3: Cross multiply
   1,948.10x = 2,688.61 × 1,109.08
4. Step 4: Simplify right side
   1,948.10x = 2,981,870.14
5. Step 5: Solve for x
   x = 2,981,870.14/1,948.10
6. Step 6: Final answer
   x = 1,530.66