Finding the Fourth Proportional to 42,860.11, 64,300.36 and 17,886.28

Step by Step Solution

1. Step 1: Write the proportion equation
   42,860.11 : 64,300.36 = 17,886.28 : x
2. Step 2: Convert to fraction form
   42,860.11/64,300.36 = 17,886.28/x
3. Step 3: Cross multiply
   42,860.11x = 64,300.36 × 17,886.28
4. Step 4: Simplify right side
   42,860.11x = 1,150,094,153.63
5. Step 5: Solve for x
   x = 1,150,094,153.63/42,860.11
6. Step 6: Final answer
   x = 26,833.67