Finding the Fourth Proportional to 47,020.50, 64,890.72 and 28,168.56

Step by Step Solution

1. Step 1: Write the proportion equation
   47,020.50 : 64,890.72 = 28,168.56 : x
2. Step 2: Convert to fraction form
   47,020.50/64,890.72 = 28,168.56/x
3. Step 3: Cross multiply
   47,020.50x = 64,890.72 × 28,168.56
4. Step 4: Simplify right side
   47,020.50x = 1,827,878,139.76
5. Step 5: Solve for x
   x = 1,827,878,139.76/47,020.50
6. Step 6: Final answer
   x = 38,874.07