Finding the Fourth Proportional to 52,615.10, 72,610.40 and 28,742.17

Step by Step Solution

1. Step 1: Write the proportion equation
   52,615.10 : 72,610.40 = 28,742.17 : x
2. Step 2: Convert to fraction form
   52,615.10/72,610.40 = 28,742.17/x
3. Step 3: Cross multiply
   52,615.10x = 72,610.40 × 28,742.17
4. Step 4: Simplify right side
   52,615.10x = 2,086,980,460.57
5. Step 5: Solve for x
   x = 2,086,980,460.57/52,615.10
6. Step 6: Final answer
   x = 39,665.05