Finding the Fourth Proportional to 42,801.79, 64,167.89 and 17,860.42

Step by Step Solution

1. Step 1: Write the proportion equation
   42,801.79 : 64,167.89 = 17,860.42 : x
2. Step 2: Convert to fraction form
   42,801.79/64,167.89 = 17,860.42/x
3. Step 3: Cross multiply
   42,801.79x = 64,167.89 × 17,860.42
4. Step 4: Simplify right side
   42,801.79x = 1,146,065,145.07
5. Step 5: Solve for x
   x = 1,146,065,145.07/42,801.79
6. Step 6: Final answer
   x = 26,776.10