Finding the Fourth Proportional to 51,530.45, 71,110.78 and 28,870.16

Step by Step Solution

1. Step 1: Write the proportion equation
   51,530.45 : 71,110.78 = 28,870.16 : x
2. Step 2: Convert to fraction form
   51,530.45/71,110.78 = 28,870.16/x
3. Step 3: Cross multiply
   51,530.45x = 71,110.78 × 28,870.16
4. Step 4: Simplify right side
   51,530.45x = 2,052,979,168.60
5. Step 5: Solve for x
   x = 2,052,979,168.60/51,530.45
6. Step 6: Final answer
   x = 39,840.12