Finding the Fourth Proportional to 1,173,238.56, 1,619,069.04 and 636,694.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,173,238.56 : 1,619,069.04 = 636,694.56 : x
2. Step 2: Convert to fraction form
   1,173,238.56/1,619,069.04 = 636,694.56/x
3. Step 3: Cross multiply
   1,173,238.56x = 1,619,069.04 × 636,694.56
4. Step 4: Simplify right side
   1,173,238.56x = 1,030,852,450,032.42
5. Step 5: Solve for x
   x = 1,030,852,450,032.42/1,173,238.56
6. Step 6: Final answer
   x = 878,638.40