Finding the Fourth Proportional to 1,978.01, 2,967.01 and 517.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,978.01 : 2,967.01 = 517.31 : x
2. Step 2: Convert to fraction form
   1,978.01/2,967.01 = 517.31/x
3. Step 3: Cross multiply
   1,978.01x = 2,967.01 × 517.31
4. Step 4: Simplify right side
   1,978.01x = 1,534,847.81
5. Step 5: Solve for x
   x = 1,534,847.81/1,978.01
6. Step 6: Final answer
   x = 775.96