Finding the Fourth Proportional to 1,434.45, 2,151.72 and 510.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,434.45 : 2,151.72 = 510.09 : x
2. Step 2: Convert to fraction form
   1,434.45/2,151.72 = 510.09/x
3. Step 3: Cross multiply
   1,434.45x = 2,151.72 × 510.09
4. Step 4: Simplify right side
   1,434.45x = 1,097,570.85
5. Step 5: Solve for x
   x = 1,097,570.85/1,434.45
6. Step 6: Final answer
   x = 765.15