Finding the Fourth Proportional to 52,218.39, 72,061.43 and 28,345.05

Step by Step Solution

1. Step 1: Write the proportion equation
   52,218.39 : 72,061.43 = 28,345.05 : x
2. Step 2: Convert to fraction form
   52,218.39/72,061.43 = 28,345.05/x
3. Step 3: Cross multiply
   52,218.39x = 72,061.43 × 28,345.05
4. Step 4: Simplify right side
   52,218.39x = 2,042,584,694.70
5. Step 5: Solve for x
   x = 2,042,584,694.70/52,218.39
6. Step 6: Final answer
   x = 39,116.19