Finding the Fourth Proportional to 1,173,200.50, 1,619,016.69 and 636,656.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,173,200.50 : 1,619,016.69 = 636,656.50 : x
2. Step 2: Convert to fraction form
   1,173,200.50/1,619,016.69 = 636,656.50/x
3. Step 3: Cross multiply
   1,173,200.50x = 1,619,016.69 × 636,656.50
4. Step 4: Simplify right side
   1,173,200.50x = 1,030,757,499,296.99
5. Step 5: Solve for x
   x = 1,030,757,499,296.99/1,173,200.50
6. Step 6: Final answer
   x = 878,585.97