Finding the Fourth Proportional to 42,874.25, 64,315.83 and 11,709.50

Step by Step Solution

1. Step 1: Write the proportion equation
   42,874.25 : 64,315.83 = 11,709.50 : x
2. Step 2: Convert to fraction form
   42,874.25/64,315.83 = 11,709.50/x
3. Step 3: Cross multiply
   42,874.25x = 64,315.83 × 11,709.50
4. Step 4: Simplify right side
   42,874.25x = 753,106,211.39
5. Step 5: Solve for x
   x = 753,106,211.39/42,874.25
6. Step 6: Final answer
   x = 17,565.47