Finding the Fourth Proportional to 1,146.69, 1,719.50 and 972.81

Step by Step Solution

1. Step 1: Write the proportion equation
   1,146.69 : 1,719.50 = 972.81 : x
2. Step 2: Convert to fraction form
   1,146.69/1,719.50 = 972.81/x
3. Step 3: Cross multiply
   1,146.69x = 1,719.50 × 972.81
4. Step 4: Simplify right side
   1,146.69x = 1,672,741.93
5. Step 5: Solve for x
   x = 1,672,741.93/1,146.69
6. Step 6: Final answer
   x = 1,458.76