Finding the Fourth Proportional to 57,002.28, 78,643.88 and 33,109.30

Step by Step Solution

1. Step 1: Write the proportion equation
   57,002.28 : 78,643.88 = 33,109.30 : x
2. Step 2: Convert to fraction form
   57,002.28/78,643.88 = 33,109.30/x
3. Step 3: Cross multiply
   57,002.28x = 78,643.88 × 33,109.30
4. Step 4: Simplify right side
   57,002.28x = 2,603,843,816.08
5. Step 5: Solve for x
   x = 2,603,843,816.08/57,002.28
6. Step 6: Final answer
   x = 45,679.64