Finding the Fourth Proportional to 1,148.67, 1,719.95 and 784.17

Step by Step Solution

1. Step 1: Write the proportion equation
   1,148.67 : 1,719.95 = 784.17 : x
2. Step 2: Convert to fraction form
   1,148.67/1,719.95 = 784.17/x
3. Step 3: Cross multiply
   1,148.67x = 1,719.95 × 784.17
4. Step 4: Simplify right side
   1,148.67x = 1,348,729.27
5. Step 5: Solve for x
   x = 1,348,729.27/1,148.67
6. Step 6: Final answer
   x = 1,174.17