Finding the Fourth Proportional to 2,174.02, 3,000.52 and 1,290.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,174.02 : 3,000.52 = 1,290.12 : x
2. Step 2: Convert to fraction form
   2,174.02/3,000.52 = 1,290.12/x
3. Step 3: Cross multiply
   2,174.02x = 3,000.52 × 1,290.12
4. Step 4: Simplify right side
   2,174.02x = 3,871,030.86
5. Step 5: Solve for x
   x = 3,871,030.86/2,174.02
6. Step 6: Final answer
   x = 1,780.59