Finding the Fourth Proportional to 2,641.60, 3,964.80 and 1,776.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,641.60 : 3,964.80 = 1,776.52 : x
2. Step 2: Convert to fraction form
   2,641.60/3,964.80 = 1,776.52/x
3. Step 3: Cross multiply
   2,641.60x = 3,964.80 × 1,776.52
4. Step 4: Simplify right side
   2,641.60x = 7,043,546.50
5. Step 5: Solve for x
   x = 7,043,546.50/2,641.60
6. Step 6: Final answer
   x = 2,666.39