Finding the Fourth Proportional to 42,879.75, 64,308 and 17,914.58

Step by Step Solution

1. Step 1: Write the proportion equation
   42,879.75 : 64,308 = 17,914.58 : x
2. Step 2: Convert to fraction form
   42,879.75/64,308 = 17,914.58/x
3. Step 3: Cross multiply
   42,879.75x = 64,308 × 17,914.58
4. Step 4: Simplify right side
   42,879.75x = 1,152,050,489.10
5. Step 5: Solve for x
   x = 1,152,050,489.10/42,879.75
6. Step 6: Final answer
   x = 26,867.01