Finding the Fourth Proportional to 11,381.99, 15,713.69 and 7,611.57

Step by Step Solution

1. Step 1: Write the proportion equation
   11,381.99 : 15,713.69 = 7,611.57 : x
2. Step 2: Convert to fraction form
   11,381.99/15,713.69 = 7,611.57/x
3. Step 3: Cross multiply
   11,381.99x = 15,713.69 × 7,611.57
4. Step 4: Simplify right side
   11,381.99x = 119,605,813.34
5. Step 5: Solve for x
   x = 119,605,813.34/11,381.99
6. Step 6: Final answer
   x = 10,508.34