Finding the Fourth Proportional to 11,111.76, 16,670.16 and 3,716.64

Step by Step Solution

1. Step 1: Write the proportion equation
   11,111.76 : 16,670.16 = 3,716.64 : x
2. Step 2: Convert to fraction form
   11,111.76/16,670.16 = 3,716.64/x
3. Step 3: Cross multiply
   11,111.76x = 16,670.16 × 3,716.64
4. Step 4: Simplify right side
   11,111.76x = 61,956,983.46
5. Step 5: Solve for x
   x = 61,956,983.46/11,111.76
6. Step 6: Final answer
   x = 5,575.80