Finding the Fourth Proportional to 1,128,090.42, 1,691,294.04 and 678,705.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,128,090.42 : 1,691,294.04 = 678,705.98 : x
2. Step 2: Convert to fraction form
   1,128,090.42/1,691,294.04 = 678,705.98/x
3. Step 3: Cross multiply
   1,128,090.42x = 1,691,294.04 × 678,705.98
4. Step 4: Simplify right side
   1,128,090.42x = 1,147,891,370,429.89
5. Step 5: Solve for x
   x = 1,147,891,370,429.89/1,128,090.42
6. Step 6: Final answer
   x = 1,017,552.63