Finding the Fourth Proportional to 3,966.90, 5,477.00 and 3,545.91

Step by Step Solution

1. Step 1: Write the proportion equation
   3,966.90 : 5,477.00 = 3,545.91 : x
2. Step 2: Convert to fraction form
   3,966.90/5,477.00 = 3,545.91/x
3. Step 3: Cross multiply
   3,966.90x = 5,477.00 × 3,545.91
4. Step 4: Simplify right side
   3,966.90x = 19,420,931.34
5. Step 5: Solve for x
   x = 19,420,931.34/3,966.90
6. Step 6: Final answer
   x = 4,895.75