Finding the Fourth Proportional to 910,578.67, 1,256,608.73 and 502,680.72

Step by Step Solution

1. Step 1: Write the proportion equation
   910,578.67 : 1,256,608.73 = 502,680.72 : x
2. Step 2: Convert to fraction form
   910,578.67/1,256,608.73 = 502,680.72/x
3. Step 3: Cross multiply
   910,578.67x = 1,256,608.73 × 502,680.72
4. Step 4: Simplify right side
   910,578.67x = 631,672,981,154.69
5. Step 5: Solve for x
   x = 631,672,981,154.69/910,578.67
6. Step 6: Final answer
   x = 693,705.01