Finding the Fourth Proportional to 745,087.68, 1,112,222.16 and 689,578.56

Step by Step Solution

1. Step 1: Write the proportion equation
   745,087.68 : 1,112,222.16 = 689,578.56 : x
2. Step 2: Convert to fraction form
   745,087.68/1,112,222.16 = 689,578.56/x
3. Step 3: Cross multiply
   745,087.68x = 1,112,222.16 × 689,578.56
4. Step 4: Simplify right side
   745,087.68x = 766,964,555,492.89
5. Step 5: Solve for x
   x = 766,964,555,492.89/745,087.68
6. Step 6: Final answer
   x = 1,029,361.48