Finding the Fourth Proportional to 6,457.01, 8,910.38 and 3,938.72

Step by Step Solution

1. Step 1: Write the proportion equation
   6,457.01 : 8,910.38 = 3,938.72 : x
2. Step 2: Convert to fraction form
   6,457.01/8,910.38 = 3,938.72/x
3. Step 3: Cross multiply
   6,457.01x = 8,910.38 × 3,938.72
4. Step 4: Simplify right side
   6,457.01x = 35,095,427.67
5. Step 5: Solve for x
   x = 35,095,427.67/6,457.01
6. Step 6: Final answer
   x = 5,435.25