Finding the Fourth Proportional to 52,390.46, 72,300.46 and 28,518.74

Step by Step Solution

1. Step 1: Write the proportion equation
   52,390.46 : 72,300.46 = 28,518.74 : x
2. Step 2: Convert to fraction form
   52,390.46/72,300.46 = 28,518.74/x
3. Step 3: Cross multiply
   52,390.46x = 72,300.46 × 28,518.74
4. Step 4: Simplify right side
   52,390.46x = 2,061,918,020.62
5. Step 5: Solve for x
   x = 2,061,918,020.62/52,390.46
6. Step 6: Final answer
   x = 39,356.75