Finding the Fourth Proportional to 1,007,145.72, 1,510,704.74 and 438,514.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,007,145.72 : 1,510,704.74 = 438,514.61 : x
2. Step 2: Convert to fraction form
   1,007,145.72/1,510,704.74 = 438,514.61/x
3. Step 3: Cross multiply
   1,007,145.72x = 1,510,704.74 × 438,514.61
4. Step 4: Simplify right side
   1,007,145.72x = 662,466,104,759.30
5. Step 5: Solve for x
   x = 662,466,104,759.30/1,007,145.72
6. Step 6: Final answer
   x = 657,765.89