Finding the Fourth Proportional to 1,390,868.82, 1,919,269.89 and 787,256.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,390,868.82 : 1,919,269.89 = 787,256.82 : x
2. Step 2: Convert to fraction form
   1,390,868.82/1,919,269.89 = 787,256.82/x
3. Step 3: Cross multiply
   1,390,868.82x = 1,919,269.89 × 787,256.82
4. Step 4: Simplify right side
   1,390,868.82x = 1,510,958,310,323.15
5. Step 5: Solve for x
   x = 1,510,958,310,323.15/1,390,868.82
6. Step 6: Final answer
   x = 1,086,341.35