Finding the Fourth Proportional to 52,722.50, 72,758.79 and 28,849.21

Step by Step Solution

1. Step 1: Write the proportion equation
   52,722.50 : 72,758.79 = 28,849.21 : x
2. Step 2: Convert to fraction form
   52,722.50/72,758.79 = 28,849.21/x
3. Step 3: Cross multiply
   52,722.50x = 72,758.79 × 28,849.21
4. Step 4: Simplify right side
   52,722.50x = 2,099,033,430.16
5. Step 5: Solve for x
   x = 2,099,033,430.16/52,722.50
6. Step 6: Final answer
   x = 39,812.86