Finding the Fourth Proportional to 42,800.76, 64,166.36 and 17,859.41

Step by Step Solution

1. Step 1: Write the proportion equation
   42,800.76 : 64,166.36 = 17,859.41 : x
2. Step 2: Convert to fraction form
   42,800.76/64,166.36 = 17,859.41/x
3. Step 3: Cross multiply
   42,800.76x = 64,166.36 × 17,859.41
4. Step 4: Simplify right side
   42,800.76x = 1,145,972,921.32
5. Step 5: Solve for x
   x = 1,145,972,921.32/42,800.76
6. Step 6: Final answer
   x = 26,774.59