Finding the Fourth Proportional to 52,212.72, 72,053.62 and 28,339.40

Step by Step Solution

1. Step 1: Write the proportion equation
   52,212.72 : 72,053.62 = 28,339.40 : x
2. Step 2: Convert to fraction form
   52,212.72/72,053.62 = 28,339.40/x
3. Step 3: Cross multiply
   52,212.72x = 72,053.62 × 28,339.40
4. Step 4: Simplify right side
   52,212.72x = 2,041,956,467.91
5. Step 5: Solve for x
   x = 2,041,956,467.91/52,212.72
6. Step 6: Final answer
   x = 39,108.41