Finding the Fourth Proportional to 52,090.89, 71,885.18 and 28,217.63

Step by Step Solution

1. Step 1: Write the proportion equation
   52,090.89 : 71,885.18 = 28,217.63 : x
2. Step 2: Convert to fraction form
   52,090.89/71,885.18 = 28,217.63/x
3. Step 3: Cross multiply
   52,090.89x = 71,885.18 × 28,217.63
4. Step 4: Simplify right side
   52,090.89x = 2,028,429,411.72
5. Step 5: Solve for x
   x = 2,028,429,411.72/52,090.89
6. Step 6: Final answer
   x = 38,940.19