Finding the Fourth Proportional to 52,852.37, 72,935.71 and 28,978.99

Step by Step Solution

1. Step 1: Write the proportion equation
   52,852.37 : 72,935.71 = 28,978.99 : x
2. Step 2: Convert to fraction form
   52,852.37/72,935.71 = 28,978.99/x
3. Step 3: Cross multiply
   52,852.37x = 72,935.71 × 28,978.99
4. Step 4: Simplify right side
   52,852.37x = 2,113,603,210.73
5. Step 5: Solve for x
   x = 2,113,603,210.73/52,852.37
6. Step 6: Final answer
   x = 39,990.70