Finding the Fourth Proportional to 1,138,969.49, 1,571,780.72 and 622,756.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,138,969.49 : 1,571,780.72 = 622,756.69 : x
2. Step 2: Convert to fraction form
   1,138,969.49/1,571,780.72 = 622,756.69/x
3. Step 3: Cross multiply
   1,138,969.49x = 1,571,780.72 × 622,756.69
4. Step 4: Simplify right side
   1,138,969.49x = 978,836,959,779.30
5. Step 5: Solve for x
   x = 978,836,959,779.30/1,138,969.49
6. Step 6: Final answer
   x = 859,405.78