Finding the Fourth Proportional to 1,172,708.42, 1,618,340.73 and 636,164.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,172,708.42 : 1,618,340.73 = 636,164.42 : x
2. Step 2: Convert to fraction form
   1,172,708.42/1,618,340.73 = 636,164.42/x
3. Step 3: Cross multiply
   1,172,708.42x = 1,618,340.73 × 636,164.42
4. Step 4: Simplify right side
   1,172,708.42x = 1,029,530,791,862.83
5. Step 5: Solve for x
   x = 1,029,530,791,862.83/1,172,708.42
6. Step 6: Final answer
   x = 877,908.59