Finding the Fourth Proportional to 52,783.28, 72,840.84 and 28,910.96

Step by Step Solution

1. Step 1: Write the proportion equation
   52,783.28 : 72,840.84 = 28,910.96 : x
2. Step 2: Convert to fraction form
   52,783.28/72,840.84 = 28,910.96/x
3. Step 3: Cross multiply
   52,783.28x = 72,840.84 × 28,910.96
4. Step 4: Simplify right side
   52,783.28x = 2,105,898,611.61
5. Step 5: Solve for x
   x = 2,105,898,611.61/52,783.28
6. Step 6: Final answer
   x = 39,897.08