Finding the Fourth Proportional to 42,873.78, 64,310.71 and 17,900.22

Step by Step Solution

1. Step 1: Write the proportion equation
   42,873.78 : 64,310.71 = 17,900.22 : x
2. Step 2: Convert to fraction form
   42,873.78/64,310.71 = 17,900.22/x
3. Step 3: Cross multiply
   42,873.78x = 64,310.71 × 17,900.22
4. Step 4: Simplify right side
   42,873.78x = 1,151,175,544.71
5. Step 5: Solve for x
   x = 1,151,175,544.71/42,873.78
6. Step 6: Final answer
   x = 26,850.34