Finding the Fourth Proportional to 42,860.35, 64,300.79 and 17,886.51

Step by Step Solution

1. Step 1: Write the proportion equation
   42,860.35 : 64,300.79 = 17,886.51 : x
2. Step 2: Convert to fraction form
   42,860.35/64,300.79 = 17,886.51/x
3. Step 3: Cross multiply
   42,860.35x = 64,300.79 × 17,886.51
4. Step 4: Simplify right side
   42,860.35x = 1,150,116,723.34
5. Step 5: Solve for x
   x = 1,150,116,723.34/42,860.35
6. Step 6: Final answer
   x = 26,834.05