Finding the Fourth Proportional to 1,665.63, 2,491.29 and 970.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,665.63 : 2,491.29 = 970.56 : x
2. Step 2: Convert to fraction form
   1,665.63/2,491.29 = 970.56/x
3. Step 3: Cross multiply
   1,665.63x = 2,491.29 × 970.56
4. Step 4: Simplify right side
   1,665.63x = 2,417,946.42
5. Step 5: Solve for x
   x = 2,417,946.42/1,665.63
6. Step 6: Final answer
   x = 1,451.67