Finding the Fourth Proportional to 52,421.31, 72,340.29 and 28,548.18

Step by Step Solution

1. Step 1: Write the proportion equation
   52,421.31 : 72,340.29 = 28,548.18 : x
2. Step 2: Convert to fraction form
   52,421.31/72,340.29 = 28,548.18/x
3. Step 3: Cross multiply
   52,421.31x = 72,340.29 × 28,548.18
4. Step 4: Simplify right side
   52,421.31x = 2,065,183,620.17
5. Step 5: Solve for x
   x = 2,065,183,620.17/52,421.31
6. Step 6: Final answer
   x = 39,395.88