Finding the Fourth Proportional to 60,638.72, 90,790.14 and 30,992.72

Step by Step Solution

1. Step 1: Write the proportion equation
   60,638.72 : 90,790.14 = 30,992.72 : x
2. Step 2: Convert to fraction form
   60,638.72/90,790.14 = 30,992.72/x
3. Step 3: Cross multiply
   60,638.72x = 90,790.14 × 30,992.72
4. Step 4: Simplify right side
   60,638.72x = 2,813,833,387.78
5. Step 5: Solve for x
   x = 2,813,833,387.78/60,638.72
6. Step 6: Final answer
   x = 46,403.25