Finding the Fourth Proportional to 52,839.61, 72,917.82 and 28,966.48

Step by Step Solution

1. Step 1: Write the proportion equation
   52,839.61 : 72,917.82 = 28,966.48 : x
2. Step 2: Convert to fraction form
   52,839.61/72,917.82 = 28,966.48/x
3. Step 3: Cross multiply
   52,839.61x = 72,917.82 × 28,966.48
4. Step 4: Simplify right side
   52,839.61x = 2,112,172,392.38
5. Step 5: Solve for x
   x = 2,112,172,392.38/52,839.61
6. Step 6: Final answer
   x = 39,973.28