Finding the Fourth Proportional to 42,801.67, 64,167.70 and 17,860.29

Step by Step Solution

1. Step 1: Write the proportion equation
   42,801.67 : 64,167.70 = 17,860.29 : x
2. Step 2: Convert to fraction form
   42,801.67/64,167.70 = 17,860.29/x
3. Step 3: Cross multiply
   42,801.67x = 64,167.70 × 17,860.29
4. Step 4: Simplify right side
   42,801.67x = 1,146,053,730.63
5. Step 5: Solve for x
   x = 1,146,053,730.63/42,801.67
6. Step 6: Final answer
   x = 26,775.91