Finding the Fourth Proportional to 52,620.09, 72,617.31 and 28,748.31

Step by Step Solution

1. Step 1: Write the proportion equation
   52,620.09 : 72,617.31 = 28,748.31 : x
2. Step 2: Convert to fraction form
   52,620.09/72,617.31 = 28,748.31/x
3. Step 3: Cross multiply
   52,620.09x = 72,617.31 × 28,748.31
4. Step 4: Simplify right side
   52,620.09x = 2,087,624,939.25
5. Step 5: Solve for x
   x = 2,087,624,939.25/52,620.09
6. Step 6: Final answer
   x = 39,673.53