Finding the Fourth Proportional to 1,200,938.43, 1,805,728.69 and 1,107,313.99

Step by Step Solution

1. Step 1: Write the proportion equation
   1,200,938.43 : 1,805,728.69 = 1,107,313.99 : x
2. Step 2: Convert to fraction form
   1,200,938.43/1,805,728.69 = 1,107,313.99/x
3. Step 3: Cross multiply
   1,200,938.43x = 1,805,728.69 × 1,107,313.99
4. Step 4: Simplify right side
   1,200,938.43x = 1,999,508,644,494.10
5. Step 5: Solve for x
   x = 1,999,508,644,494.10/1,200,938.43
6. Step 6: Final answer
   x = 1,664,955.16