Finding the Fourth Proportional to 2,505.72, 3,457.27 and 1,620.45

Step by Step Solution

1. Step 1: Write the proportion equation
   2,505.72 : 3,457.27 = 1,620.45 : x
2. Step 2: Convert to fraction form
   2,505.72/3,457.27 = 1,620.45/x
3. Step 3: Cross multiply
   2,505.72x = 3,457.27 × 1,620.45
4. Step 4: Simplify right side
   2,505.72x = 5,602,333.17
5. Step 5: Solve for x
   x = 5,602,333.17/2,505.72
6. Step 6: Final answer
   x = 2,235.82