Finding the Fourth Proportional to 60,990.47, 91,449.76 and 28,496.73

Step by Step Solution

1. Step 1: Write the proportion equation
   60,990.47 : 91,449.76 = 28,496.73 : x
2. Step 2: Convert to fraction form
   60,990.47/91,449.76 = 28,496.73/x
3. Step 3: Cross multiply
   60,990.47x = 91,449.76 × 28,496.73
4. Step 4: Simplify right side
   60,990.47x = 2,606,019,119.28
5. Step 5: Solve for x
   x = 2,606,019,119.28/60,990.47
6. Step 6: Final answer
   x = 42,728.30