Finding the Fourth Proportional to 1,300.08, 1,948.30 and 860.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,300.08 : 1,948.30 = 860.61 : x
2. Step 2: Convert to fraction form
   1,300.08/1,948.30 = 860.61/x
3. Step 3: Cross multiply
   1,300.08x = 1,948.30 × 860.61
4. Step 4: Simplify right side
   1,300.08x = 1,676,725.50
5. Step 5: Solve for x
   x = 1,676,725.50/1,300.08
6. Step 6: Final answer
   x = 1,289.71