Finding the Fourth Proportional to 1,654.72, 2,469.76 and 1,389.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,654.72 : 2,469.76 = 1,389.76 : x
2. Step 2: Convert to fraction form
   1,654.72/2,469.76 = 1,389.76/x
3. Step 3: Cross multiply
   1,654.72x = 2,469.76 × 1,389.76
4. Step 4: Simplify right side
   1,654.72x = 3,432,373.66
5. Step 5: Solve for x
   x = 3,432,373.66/1,654.72
6. Step 6: Final answer
   x = 2,074.29