Finding the Fourth Proportional to 1,233.56, 1,847.90 and 647.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,233.56 : 1,847.90 = 647.69 : x
2. Step 2: Convert to fraction form
   1,233.56/1,847.90 = 647.69/x
3. Step 3: Cross multiply
   1,233.56x = 1,847.90 × 647.69
4. Step 4: Simplify right side
   1,233.56x = 1,196,858.73
5. Step 5: Solve for x
   x = 1,196,858.73/1,233.56
6. Step 6: Final answer
   x = 970.25