Finding the Fourth Proportional to 1,387,842.72, 2,080,233.72 and 907,871.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,387,842.72 : 2,080,233.72 = 907,871.28 : x
2. Step 2: Convert to fraction form
   1,387,842.72/2,080,233.72 = 907,871.28/x
3. Step 3: Cross multiply
   1,387,842.72x = 2,080,233.72 × 907,871.28
4. Step 4: Simplify right side
   1,387,842.72x = 1,888,584,450,075.56
5. Step 5: Solve for x
   x = 1,888,584,450,075.56/1,387,842.72
6. Step 6: Final answer
   x = 1,360,805.82