Finding the Fourth Proportional to 1,399,815.88, 2,097,771.85 and 1,057,978.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,399,815.88 : 2,097,771.85 = 1,057,978.69 : x
2. Step 2: Convert to fraction form
   1,399,815.88/2,097,771.85 = 1,057,978.69/x
3. Step 3: Cross multiply
   1,399,815.88x = 2,097,771.85 × 1,057,978.69
4. Step 4: Simplify right side
   1,399,815.88x = 2,219,397,913,781.88
5. Step 5: Solve for x
   x = 2,219,397,913,781.88/1,399,815.88
6. Step 6: Final answer
   x = 1,585,492.74