Finding the Fourth Proportional to 3,945.77, 5,916.59 and 1,172.06

Step by Step Solution

1. Step 1: Write the proportion equation
   3,945.77 : 5,916.59 = 1,172.06 : x
2. Step 2: Convert to fraction form
   3,945.77/5,916.59 = 1,172.06/x
3. Step 3: Cross multiply
   3,945.77x = 5,916.59 × 1,172.06
4. Step 4: Simplify right side
   3,945.77x = 6,934,598.48
5. Step 5: Solve for x
   x = 6,934,598.48/3,945.77
6. Step 6: Final answer
   x = 1,757.48