Finding the Fourth Proportional to 52,591.98, 72,578.61 and 28,719.90

Step by Step Solution

1. Step 1: Write the proportion equation
   52,591.98 : 72,578.61 = 28,719.90 : x
2. Step 2: Convert to fraction form
   52,591.98/72,578.61 = 28,719.90/x
3. Step 3: Cross multiply
   52,591.98x = 72,578.61 × 28,719.90
4. Step 4: Simplify right side
   52,591.98x = 2,084,450,421.34
5. Step 5: Solve for x
   x = 2,084,450,421.34/52,591.98
6. Step 6: Final answer
   x = 39,634.38