Finding the Fourth Proportional to 1,173,174.50, 1,618,980.81 and 636,630.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,173,174.50 : 1,618,980.81 = 636,630.50 : x
2. Step 2: Convert to fraction form
   1,173,174.50/1,618,980.81 = 636,630.50/x
3. Step 3: Cross multiply
   1,173,174.50x = 1,618,980.81 × 636,630.50
4. Step 4: Simplify right side
   1,173,174.50x = 1,030,692,562,560.71
5. Step 5: Solve for x
   x = 1,030,692,562,560.71/1,173,174.50
6. Step 6: Final answer
   x = 878,550.09