Finding the Fourth Proportional to 60,680.74, 91,025.72 and 20,687.30

Step by Step Solution

1. Step 1: Write the proportion equation
   60,680.74 : 91,025.72 = 20,687.30 : x
2. Step 2: Convert to fraction form
   60,680.74/91,025.72 = 20,687.30/x
3. Step 3: Cross multiply
   60,680.74x = 91,025.72 × 20,687.30
4. Step 4: Simplify right side
   60,680.74x = 1,883,076,377.36
5. Step 5: Solve for x
   x = 1,883,076,377.36/60,680.74
6. Step 6: Final answer
   x = 31,032.52