Finding the Fourth Proportional to 52,308.79, 72,185.28 and 28,436.06

Step by Step Solution

1. Step 1: Write the proportion equation
   52,308.79 : 72,185.28 = 28,436.06 : x
2. Step 2: Convert to fraction form
   52,308.79/72,185.28 = 28,436.06/x
3. Step 3: Cross multiply
   52,308.79x = 72,185.28 × 28,436.06
4. Step 4: Simplify right side
   52,308.79x = 2,052,665,027.02
5. Step 5: Solve for x
   x = 2,052,665,027.02/52,308.79
6. Step 6: Final answer
   x = 39,241.30