Finding the Fourth Proportional to 52,419.78, 72,340.59 and 28,547.75

Step by Step Solution

1. Step 1: Write the proportion equation
   52,419.78 : 72,340.59 = 28,547.75 : x
2. Step 2: Convert to fraction form
   52,419.78/72,340.59 = 28,547.75/x
3. Step 3: Cross multiply
   52,419.78x = 72,340.59 × 28,547.75
4. Step 4: Simplify right side
   52,419.78x = 2,065,160,716.47
5. Step 5: Solve for x
   x = 2,065,160,716.47/52,419.78
6. Step 6: Final answer
   x = 39,396.59