Finding the Fourth Proportional to 42,798.14, 64,162.42 and 17,856.77

Step by Step Solution

1. Step 1: Write the proportion equation
   42,798.14 : 64,162.42 = 17,856.77 : x
2. Step 2: Convert to fraction form
   42,798.14/64,162.42 = 17,856.77/x
3. Step 3: Cross multiply
   42,798.14x = 64,162.42 × 17,856.77
4. Step 4: Simplify right side
   42,798.14x = 1,145,733,572.04
5. Step 5: Solve for x
   x = 1,145,733,572.04/42,798.14
6. Step 6: Final answer
   x = 26,770.64