Finding the Fourth Proportional to 52,645.42, 72,650.69 and 28,772.09

Step by Step Solution

1. Step 1: Write the proportion equation
   52,645.42 : 72,650.69 = 28,772.09 : x
2. Step 2: Convert to fraction form
   52,645.42/72,650.69 = 28,772.09/x
3. Step 3: Cross multiply
   52,645.42x = 72,650.69 × 28,772.09
4. Step 4: Simplify right side
   52,645.42x = 2,090,312,191.24
5. Step 5: Solve for x
   x = 2,090,312,191.24/52,645.42
6. Step 6: Final answer
   x = 39,705.49