Finding the Fourth Proportional to 1,076,578.72, 1,616,296.56 and 919,814.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,076,578.72 : 1,616,296.56 = 919,814.56 : x
2. Step 2: Convert to fraction form
   1,076,578.72/1,616,296.56 = 919,814.56/x
3. Step 3: Cross multiply
   1,076,578.72x = 1,616,296.56 × 919,814.56
4. Step 4: Simplify right side
   1,076,578.72x = 1,486,693,109,165.91
5. Step 5: Solve for x
   x = 1,486,693,109,165.91/1,076,578.72
6. Step 6: Final answer
   x = 1,380,942.31