Finding the Fourth Proportional to 1,997.64, 2,997.69 and 765.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,997.64 : 2,997.69 = 765.15 : x
2. Step 2: Convert to fraction form
   1,997.64/2,997.69 = 765.15/x
3. Step 3: Cross multiply
   1,997.64x = 2,997.69 × 765.15
4. Step 4: Simplify right side
   1,997.64x = 2,293,682.50
5. Step 5: Solve for x
   x = 2,293,682.50/1,997.64
6. Step 6: Final answer
   x = 1,148.20