Finding the Fourth Proportional to 11,301.66, 15,588.52 and 7,758.72

Step by Step Solution

1. Step 1: Write the proportion equation
   11,301.66 : 15,588.52 = 7,758.72 : x
2. Step 2: Convert to fraction form
   11,301.66/15,588.52 = 7,758.72/x
3. Step 3: Cross multiply
   11,301.66x = 15,588.52 × 7,758.72
4. Step 4: Simplify right side
   11,301.66x = 120,946,942.50
5. Step 5: Solve for x
   x = 120,946,942.50/11,301.66
6. Step 6: Final answer
   x = 10,701.70