Finding the Fourth Proportional to 2,079.72, 3,117.12 and 846.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,079.72 : 3,117.12 = 846.48 : x
2. Step 2: Convert to fraction form
   2,079.72/3,117.12 = 846.48/x
3. Step 3: Cross multiply
   2,079.72x = 3,117.12 × 846.48
4. Step 4: Simplify right side
   2,079.72x = 2,638,579.74
5. Step 5: Solve for x
   x = 2,638,579.74/2,079.72
6. Step 6: Final answer
   x = 1,268.72