Finding the Fourth Proportional to 1,172,800.42, 1,618,467.69 and 636,256.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,172,800.42 : 1,618,467.69 = 636,256.42 : x
2. Step 2: Convert to fraction form
   1,172,800.42/1,618,467.69 = 636,256.42/x
3. Step 3: Cross multiply
   1,172,800.42x = 1,618,467.69 × 636,256.42
4. Step 4: Simplify right side
   1,172,800.42x = 1,029,760,458,325.07
5. Step 5: Solve for x
   x = 1,029,760,458,325.07/1,172,800.42
6. Step 6: Final answer
   x = 878,035.55