Finding the Fourth Proportional to 40,520.84, 60,621.42 and 30,688.52

Step by Step Solution

1. Step 1: Write the proportion equation
   40,520.84 : 60,621.42 = 30,688.52 : x
2. Step 2: Convert to fraction form
   40,520.84/60,621.42 = 30,688.52/x
3. Step 3: Cross multiply
   40,520.84x = 60,621.42 × 30,688.52
4. Step 4: Simplify right side
   40,520.84x = 1,860,381,660.10
5. Step 5: Solve for x
   x = 1,860,381,660.10/40,520.84
6. Step 6: Final answer
   x = 45,911.72