Finding the Fourth Proportional to 8,781.57, 12,113.01 and 5,377.01

Step by Step Solution

1. Step 1: Write the proportion equation
   8,781.57 : 12,113.01 = 5,377.01 : x
2. Step 2: Convert to fraction form
   8,781.57/12,113.01 = 5,377.01/x
3. Step 3: Cross multiply
   8,781.57x = 12,113.01 × 5,377.01
4. Step 4: Simplify right side
   8,781.57x = 65,131,715.34
5. Step 5: Solve for x
   x = 65,131,715.34/8,781.57
6. Step 6: Final answer
   x = 7,416.86