Finding the Fourth Proportional to 60,111.99, 90,161.91 and 20,671.88

Step by Step Solution

1. Step 1: Write the proportion equation
   60,111.99 : 90,161.91 = 20,671.88 : x
2. Step 2: Convert to fraction form
   60,111.99/90,161.91 = 20,671.88/x
3. Step 3: Cross multiply
   60,111.99x = 90,161.91 × 20,671.88
4. Step 4: Simplify right side
   60,111.99x = 1,863,815,733.28
5. Step 5: Solve for x
   x = 1,863,815,733.28/60,111.99
6. Step 6: Final answer
   x = 31,005.72