Finding the Fourth Proportional to 52,692.42, 72,715.60 and 28,819.02

Step by Step Solution

1. Step 1: Write the proportion equation
   52,692.42 : 72,715.60 = 28,819.02 : x
2. Step 2: Convert to fraction form
   52,692.42/72,715.60 = 28,819.02/x
3. Step 3: Cross multiply
   52,692.42x = 72,715.60 × 28,819.02
4. Step 4: Simplify right side
   52,692.42x = 2,095,592,330.71
5. Step 5: Solve for x
   x = 2,095,592,330.71/52,692.42
6. Step 6: Final answer
   x = 39,770.28