Finding the Fourth Proportional to 52,530.10, 72,491.42 and 28,656.78

Step by Step Solution

1. Step 1: Write the proportion equation
   52,530.10 : 72,491.42 = 28,656.78 : x
2. Step 2: Convert to fraction form
   52,530.10/72,491.42 = 28,656.78/x
3. Step 3: Cross multiply
   52,530.10x = 72,491.42 × 28,656.78
4. Step 4: Simplify right side
   52,530.10x = 2,077,370,674.83
5. Step 5: Solve for x
   x = 2,077,370,674.83/52,530.10
6. Step 6: Final answer
   x = 39,546.29