Finding the Fourth Proportional to 42,860.10, 64,300.42 and 17,886.26

Step by Step Solution

1. Step 1: Write the proportion equation
   42,860.10 : 64,300.42 = 17,886.26 : x
2. Step 2: Convert to fraction form
   42,860.10/64,300.42 = 17,886.26/x
3. Step 3: Cross multiply
   42,860.10x = 64,300.42 × 17,886.26
4. Step 4: Simplify right side
   42,860.10x = 1,150,094,030.23
5. Step 5: Solve for x
   x = 1,150,094,030.23/42,860.10
6. Step 6: Final answer
   x = 26,833.68