Finding the Fourth Proportional to 2,646.76, 3,648.32 and 2,086.32

Step by Step Solution

1. Step 1: Write the proportion equation
   2,646.76 : 3,648.32 = 2,086.32 : x
2. Step 2: Convert to fraction form
   2,646.76/3,648.32 = 2,086.32/x
3. Step 3: Cross multiply
   2,646.76x = 3,648.32 × 2,086.32
4. Step 4: Simplify right side
   2,646.76x = 7,611,562.98
5. Step 5: Solve for x
   x = 7,611,562.98/2,646.76
6. Step 6: Final answer
   x = 2,875.80