Finding the Fourth Proportional to 52,298.78, 72,172.06 and 28,425.45

Step by Step Solution

1. Step 1: Write the proportion equation
   52,298.78 : 72,172.06 = 28,425.45 : x
2. Step 2: Convert to fraction form
   52,298.78/72,172.06 = 28,425.45/x
3. Step 3: Cross multiply
   52,298.78x = 72,172.06 × 28,425.45
4. Step 4: Simplify right side
   52,298.78x = 2,051,523,211.86
5. Step 5: Solve for x
   x = 2,051,523,211.86/52,298.78
6. Step 6: Final answer
   x = 39,226.98