Finding the Fourth Proportional to 42,798.23, 64,162.56 and 17,856.86

Step by Step Solution

1. Step 1: Write the proportion equation
   42,798.23 : 64,162.56 = 17,856.86 : x
2. Step 2: Convert to fraction form
   42,798.23/64,162.56 = 17,856.86/x
3. Step 3: Cross multiply
   42,798.23x = 64,162.56 × 17,856.86
4. Step 4: Simplify right side
   42,798.23x = 1,145,741,851.16
5. Step 5: Solve for x
   x = 1,145,741,851.16/42,798.23
6. Step 6: Final answer
   x = 26,770.78