Finding the Fourth Proportional to 52,479.38, 72,419.40 and 28,605.53

Step by Step Solution

1. Step 1: Write the proportion equation
   52,479.38 : 72,419.40 = 28,605.53 : x
2. Step 2: Convert to fraction form
   52,479.38/72,419.40 = 28,605.53/x
3. Step 3: Cross multiply
   52,479.38x = 72,419.40 × 28,605.53
4. Step 4: Simplify right side
   52,479.38x = 2,071,595,500.33
5. Step 5: Solve for x
   x = 2,071,595,500.33/52,479.38
6. Step 6: Final answer
   x = 39,474.46