Finding the Fourth Proportional to 1,289.47, 1,779.42 and 700.00

Step by Step Solution

1. Step 1: Write the proportion equation
   1,289.47 : 1,779.42 = 700.00 : x
2. Step 2: Convert to fraction form
   1,289.47/1,779.42 = 700.00/x
3. Step 3: Cross multiply
   1,289.47x = 1,779.42 × 700.00
4. Step 4: Simplify right side
   1,289.47x = 1,245,585.10
5. Step 5: Solve for x
   x = 1,245,585.10/1,289.47
6. Step 6: Final answer
   x = 965.96