Finding the Fourth Proportional to 1,437.30, 2,155.23 and 512.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,437.30 : 2,155.23 = 512.72 : x
2. Step 2: Convert to fraction form
   1,437.30/2,155.23 = 512.72/x
3. Step 3: Cross multiply
   1,437.30x = 2,155.23 × 512.72
4. Step 4: Simplify right side
   1,437.30x = 1,105,026.83
5. Step 5: Solve for x
   x = 1,105,026.83/1,437.30
6. Step 6: Final answer
   x = 768.82