Finding the Fourth Proportional to 5,111.13, 7,662.51 and 2,646.66

Step by Step Solution

1. Step 1: Write the proportion equation
   5,111.13 : 7,662.51 = 2,646.66 : x
2. Step 2: Convert to fraction form
   5,111.13/7,662.51 = 2,646.66/x
3. Step 3: Cross multiply
   5,111.13x = 7,662.51 × 2,646.66
4. Step 4: Simplify right side
   5,111.13x = 20,280,058.72
5. Step 5: Solve for x
   x = 20,280,058.72/5,111.13
6. Step 6: Final answer
   x = 3,967.82