Finding the Fourth Proportional to 2,665.01, 3,996.70 and 1,277.63

Step by Step Solution

1. Step 1: Write the proportion equation
   2,665.01 : 3,996.70 = 1,277.63 : x
2. Step 2: Convert to fraction form
   2,665.01/3,996.70 = 1,277.63/x
3. Step 3: Cross multiply
   2,665.01x = 3,996.70 × 1,277.63
4. Step 4: Simplify right side
   2,665.01x = 5,106,303.82
5. Step 5: Solve for x
   x = 5,106,303.82/2,665.01
6. Step 6: Final answer
   x = 1,916.05