Finding the Fourth Proportional to 52,651.37, 72,656.36 and 28,778.05

Step by Step Solution

1. Step 1: Write the proportion equation
   52,651.37 : 72,656.36 = 28,778.05 : x
2. Step 2: Convert to fraction form
   52,651.37/72,656.36 = 28,778.05/x
3. Step 3: Cross multiply
   52,651.37x = 72,656.36 × 28,778.05
4. Step 4: Simplify right side
   52,651.37x = 2,090,908,415.75
5. Step 5: Solve for x
   x = 2,090,908,415.75/52,651.37
6. Step 6: Final answer
   x = 39,712.33