Finding the Fourth Proportional to 2,139.48, 2,951.60 and 1,300.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,139.48 : 2,951.60 = 1,300.05 : x
2. Step 2: Convert to fraction form
   2,139.48/2,951.60 = 1,300.05/x
3. Step 3: Cross multiply
   2,139.48x = 2,951.60 × 1,300.05
4. Step 4: Simplify right side
   2,139.48x = 3,837,214.89
5. Step 5: Solve for x
   x = 3,837,214.89/2,139.48
6. Step 6: Final answer
   x = 1,793.53