Finding the Fourth Proportional to 52,713.90, 72,745.36 and 28,840.50

Step by Step Solution

1. Step 1: Write the proportion equation
   52,713.90 : 72,745.36 = 28,840.50 : x
2. Step 2: Convert to fraction form
   52,713.90/72,745.36 = 28,840.50/x
3. Step 3: Cross multiply
   52,713.90x = 72,745.36 × 28,840.50
4. Step 4: Simplify right side
   52,713.90x = 2,098,012,482.98
5. Step 5: Solve for x
   x = 2,098,012,482.98/52,713.90
6. Step 6: Final answer
   x = 39,799.99