Finding the Fourth Proportional to 52,578.72, 72,558.75 and 28,705.40

Step by Step Solution

1. Step 1: Write the proportion equation
   52,578.72 : 72,558.75 = 28,705.40 : x
2. Step 2: Convert to fraction form
   52,578.72/72,558.75 = 28,705.40/x
3. Step 3: Cross multiply
   52,578.72x = 72,558.75 × 28,705.40
4. Step 4: Simplify right side
   52,578.72x = 2,082,827,942.25
5. Step 5: Solve for x
   x = 2,082,827,942.25/52,578.72
6. Step 6: Final answer
   x = 39,613.52