Finding the Fourth Proportional to 3,167.86, 4,748.60 and 1,320.00

Step by Step Solution

1. Step 1: Write the proportion equation
   3,167.86 : 4,748.60 = 1,320.00 : x
2. Step 2: Convert to fraction form
   3,167.86/4,748.60 = 1,320.00/x
3. Step 3: Cross multiply
   3,167.86x = 4,748.60 × 1,320.00
4. Step 4: Simplify right side
   3,167.86x = 6,268,133.78
5. Step 5: Solve for x
   x = 6,268,133.78/3,167.86
6. Step 6: Final answer
   x = 1,978.67