Finding the Fourth Proportional to 1,388,548.78, 1,916,341.55 and 799,868.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,388,548.78 : 1,916,341.55 = 799,868.57 : x
2. Step 2: Convert to fraction form
   1,388,548.78/1,916,341.55 = 799,868.57/x
3. Step 3: Cross multiply
   1,388,548.78x = 1,916,341.55 × 799,868.57
4. Step 4: Simplify right side
   1,388,548.78x = 1,532,821,366,439.89
5. Step 5: Solve for x
   x = 1,532,821,366,439.89/1,388,548.78
6. Step 6: Final answer
   x = 1,103,901.71