Finding the Fourth Proportional to 11,484.99, 17,205.57 and 7,780.86

Step by Step Solution

1. Step 1: Write the proportion equation
   11,484.99 : 17,205.57 = 7,780.86 : x
2. Step 2: Convert to fraction form
   11,484.99/17,205.57 = 7,780.86/x
3. Step 3: Cross multiply
   11,484.99x = 17,205.57 × 7,780.86
4. Step 4: Simplify right side
   11,484.99x = 133,874,131.39
5. Step 5: Solve for x
   x = 133,874,131.39/11,484.99
6. Step 6: Final answer
   x = 11,656.44