Finding the Fourth Proportional to 947.48, 1,308.15 and 699.30

Step by Step Solution

1. Step 1: Write the proportion equation
   947.48 : 1,308.15 = 699.30 : x
2. Step 2: Convert to fraction form
   947.48/1,308.15 = 699.30/x
3. Step 3: Cross multiply
   947.48x = 1,308.15 × 699.30
4. Step 4: Simplify right side
   947.48x = 914,789.30
5. Step 5: Solve for x
   x = 914,789.30/947.48
6. Step 6: Final answer
   x = 965.50