Finding the Fourth Proportional to 1,128,100.42, 1,691,309.04 and 678,715.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,128,100.42 : 1,691,309.04 = 678,715.98 : x
2. Step 2: Convert to fraction form
   1,128,100.42/1,691,309.04 = 678,715.98/x
3. Step 3: Cross multiply
   1,128,100.42x = 1,691,309.04 × 678,715.98
4. Step 4: Simplify right side
   1,128,100.42x = 1,147,918,472,566.46
5. Step 5: Solve for x
   x = 1,147,918,472,566.46/1,128,100.42
6. Step 6: Final answer
   x = 1,017,567.63