Finding the Fourth Proportional to 1,318.30, 1,978.37 and 972.53

Step by Step Solution

1. Step 1: Write the proportion equation
   1,318.30 : 1,978.37 = 972.53 : x
2. Step 2: Convert to fraction form
   1,318.30/1,978.37 = 972.53/x
3. Step 3: Cross multiply
   1,318.30x = 1,978.37 × 972.53
4. Step 4: Simplify right side
   1,318.30x = 1,924,009.42
5. Step 5: Solve for x
   x = 1,924,009.42/1,318.30
6. Step 6: Final answer
   x = 1,459.47