Finding the Fourth Proportional to 52,314, 72,192 and 28,440.12

Step by Step Solution

1. Step 1: Write the proportion equation
   52,314 : 72,192 = 28,440.12 : x
2. Step 2: Convert to fraction form
   52,314/72,192 = 28,440.12/x
3. Step 3: Cross multiply
   52,314x = 72,192 × 28,440.12
4. Step 4: Simplify right side
   52,314x = 2,053,149,143.04
5. Step 5: Solve for x
   x = 2,053,149,143.04/52,314
6. Step 6: Final answer
   x = 39,246.65