Finding the Fourth Proportional to 1,173.02, 1,617.78 and 948.85

Step by Step Solution

1. Step 1: Write the proportion equation
   1,173.02 : 1,617.78 = 948.85 : x
2. Step 2: Convert to fraction form
   1,173.02/1,617.78 = 948.85/x
3. Step 3: Cross multiply
   1,173.02x = 1,617.78 × 948.85
4. Step 4: Simplify right side
   1,173.02x = 1,535,030.55
5. Step 5: Solve for x
   x = 1,535,030.55/1,173.02
6. Step 6: Final answer
   x = 1,308.61