Finding the Fourth Proportional to 52,621.72, 72,616.74 and 28,748.44

Step by Step Solution

1. Step 1: Write the proportion equation
   52,621.72 : 72,616.74 = 28,748.44 : x
2. Step 2: Convert to fraction form
   52,621.72/72,616.74 = 28,748.44/x
3. Step 3: Cross multiply
   52,621.72x = 72,616.74 × 28,748.44
4. Step 4: Simplify right side
   52,621.72x = 2,087,617,992.89
5. Step 5: Solve for x
   x = 2,087,617,992.89/52,621.72
6. Step 6: Final answer
   x = 39,672.17