Finding the Fourth Proportional to 52,693.76, 72,716.80 and 28,821.12

Step by Step Solution

1. Step 1: Write the proportion equation
   52,693.76 : 72,716.80 = 28,821.12 : x
2. Step 2: Convert to fraction form
   52,693.76/72,716.80 = 28,821.12/x
3. Step 3: Cross multiply
   52,693.76x = 72,716.80 × 28,821.12
4. Step 4: Simplify right side
   52,693.76x = 2,095,779,618.82
5. Step 5: Solve for x
   x = 2,095,779,618.82/52,693.76
6. Step 6: Final answer
   x = 39,772.82