Finding the Fourth Proportional to 1,948.70, 2,688.59 and 1,109.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,948.70 : 2,688.59 = 1,109.43 : x
2. Step 2: Convert to fraction form
   1,948.70/2,688.59 = 1,109.43/x
3. Step 3: Cross multiply
   1,948.70x = 2,688.59 × 1,109.43
4. Step 4: Simplify right side
   1,948.70x = 2,982,796.86
5. Step 5: Solve for x
   x = 2,982,796.86/1,948.70
6. Step 6: Final answer
   x = 1,530.66