Finding the Fourth Proportional to 52,289.10, 72,158.90 and 28,415.72

Step by Step Solution

1. Step 1: Write the proportion equation
   52,289.10 : 72,158.90 = 28,415.72 : x
2. Step 2: Convert to fraction form
   52,289.10/72,158.90 = 28,415.72/x
3. Step 3: Cross multiply
   52,289.10x = 72,158.90 × 28,415.72
4. Step 4: Simplify right side
   52,289.10x = 2,050,447,097.91
5. Step 5: Solve for x
   x = 2,050,447,097.91/52,289.10
6. Step 6: Final answer
   x = 39,213.66