Finding the Fourth Proportional to 1,128,094.90, 1,691,300.79 and 678,710.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,128,094.90 : 1,691,300.79 = 678,710.48 : x
2. Step 2: Convert to fraction form
   1,128,094.90/1,691,300.79 = 678,710.48/x
3. Step 3: Cross multiply
   1,128,094.90x = 1,691,300.79 × 678,710.48
4. Step 4: Simplify right side
   1,128,094.90x = 1,147,903,562,548.78
5. Step 5: Solve for x
   x = 1,147,903,562,548.78/1,128,094.90
6. Step 6: Final answer
   x = 1,017,559.40