Finding the Fourth Proportional to 60,620.43, 91,096.79 and 57,181.35

Step by Step Solution

1. Step 1: Write the proportion equation
   60,620.43 : 91,096.79 = 57,181.35 : x
2. Step 2: Convert to fraction form
   60,620.43/91,096.79 = 57,181.35/x
3. Step 3: Cross multiply
   60,620.43x = 91,096.79 × 57,181.35
4. Step 4: Simplify right side
   60,620.43x = 5,209,037,146.96
5. Step 5: Solve for x
   x = 5,209,037,146.96/60,620.43
6. Step 6: Final answer
   x = 85,928.74