Finding the Fourth Proportional to 1,191,986.69, 1,644,962.19 and 648,126.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,191,986.69 : 1,644,962.19 = 648,126.15 : x
2. Step 2: Convert to fraction form
   1,191,986.69/1,644,962.19 = 648,126.15/x
3. Step 3: Cross multiply
   1,191,986.69x = 1,644,962.19 × 648,126.15
4. Step 4: Simplify right side
   1,191,986.69x = 1,066,143,002,501.19
5. Step 5: Solve for x
   x = 1,066,143,002,501.19/1,191,986.69
6. Step 6: Final answer
   x = 894,425.26