Finding the Fourth Proportional to 52,288.48, 72,158.05 and 28,415.10

Step by Step Solution

1. Step 1: Write the proportion equation
   52,288.48 : 72,158.05 = 28,415.10 : x
2. Step 2: Convert to fraction form
   52,288.48/72,158.05 = 28,415.10/x
3. Step 3: Cross multiply
   52,288.48x = 72,158.05 × 28,415.10
4. Step 4: Simplify right side
   52,288.48x = 2,050,378,206.56
5. Step 5: Solve for x
   x = 2,050,378,206.56/52,288.48
6. Step 6: Final answer
   x = 39,212.81