Finding the Fourth Proportional to 2,630.79, 3,946.38 and 875.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,630.79 : 3,946.38 = 875.72 : x
2. Step 2: Convert to fraction form
   2,630.79/3,946.38 = 875.72/x
3. Step 3: Cross multiply
   2,630.79x = 3,946.38 × 875.72
4. Step 4: Simplify right side
   2,630.79x = 3,455,904.16
5. Step 5: Solve for x
   x = 3,455,904.16/2,630.79
6. Step 6: Final answer
   x = 1,313.64