Finding the Fourth Proportional to 42,860.42, 64,300.89 and 17,886.57

Step by Step Solution

1. Step 1: Write the proportion equation
   42,860.42 : 64,300.89 = 17,886.57 : x
2. Step 2: Convert to fraction form
   42,860.42/64,300.89 = 17,886.57/x
3. Step 3: Cross multiply
   42,860.42x = 64,300.89 × 17,886.57
4. Step 4: Simplify right side
   42,860.42x = 1,150,122,370.05
5. Step 5: Solve for x
   x = 1,150,122,370.05/42,860.42
6. Step 6: Final answer
   x = 26,834.14