Finding the Fourth Proportional to 1,230.25, 1,697.76 and 706.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,230.25 : 1,697.76 = 706.30 : x
2. Step 2: Convert to fraction form
   1,230.25/1,697.76 = 706.30/x
3. Step 3: Cross multiply
   1,230.25x = 1,697.76 × 706.30
4. Step 4: Simplify right side
   1,230.25x = 1,199,127.89
5. Step 5: Solve for x
   x = 1,199,127.89/1,230.25
6. Step 6: Final answer
   x = 974.70