Finding the Fourth Proportional to 52,492.78, 72,440.45 and 28,619.62

Step by Step Solution

1. Step 1: Write the proportion equation
   52,492.78 : 72,440.45 = 28,619.62 : x
2. Step 2: Convert to fraction form
   52,492.78/72,440.45 = 28,619.62/x
3. Step 3: Cross multiply
   52,492.78x = 72,440.45 × 28,619.62
4. Step 4: Simplify right side
   52,492.78x = 2,073,218,151.63
5. Step 5: Solve for x
   x = 2,073,218,151.63/52,492.78
6. Step 6: Final answer
   x = 39,495.30