Finding the Fourth Proportional to 1,642.02, 2,266.02 and 1,288.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,642.02 : 2,266.02 = 1,288.37 : x
2. Step 2: Convert to fraction form
   1,642.02/2,266.02 = 1,288.37/x
3. Step 3: Cross multiply
   1,642.02x = 2,266.02 × 1,288.37
4. Step 4: Simplify right side
   1,642.02x = 2,919,460.86
5. Step 5: Solve for x
   x = 2,919,460.86/1,642.02
6. Step 6: Final answer
   x = 1,777.97