Finding the Fourth Proportional to 52,218.65, 72,061.28 and 28,345.31

Step by Step Solution

1. Step 1: Write the proportion equation
   52,218.65 : 72,061.28 = 28,345.31 : x
2. Step 2: Convert to fraction form
   52,218.65/72,061.28 = 28,345.31/x
3. Step 3: Cross multiply
   52,218.65x = 72,061.28 × 28,345.31
4. Step 4: Simplify right side
   52,218.65x = 2,042,598,818.56
5. Step 5: Solve for x
   x = 2,042,598,818.56/52,218.65
6. Step 6: Final answer
   x = 39,116.27