Finding the Fourth Proportional to 10,987.86, 16,465.50 and 5,777.94

Step by Step Solution

1. Step 1: Write the proportion equation
   10,987.86 : 16,465.50 = 5,777.94 : x
2. Step 2: Convert to fraction form
   10,987.86/16,465.50 = 5,777.94/x
3. Step 3: Cross multiply
   10,987.86x = 16,465.50 × 5,777.94
4. Step 4: Simplify right side
   10,987.86x = 95,136,671.07
5. Step 5: Solve for x
   x = 95,136,671.07/10,987.86
6. Step 6: Final answer
   x = 8,658.34