Finding the Fourth Proportional to 1,233.16, 1,699.86 and 970.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,233.16 : 1,699.86 = 970.72 : x
2. Step 2: Convert to fraction form
   1,233.16/1,699.86 = 970.72/x
3. Step 3: Cross multiply
   1,233.16x = 1,699.86 × 970.72
4. Step 4: Simplify right side
   1,233.16x = 1,650,088.10
5. Step 5: Solve for x
   x = 1,650,088.10/1,233.16
6. Step 6: Final answer
   x = 1,338.10