Finding the Fourth Proportional to 12,477.60, 17,201.52 and 7,758.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,477.60 : 17,201.52 = 7,758.72 : x
2. Step 2: Convert to fraction form
   12,477.60/17,201.52 = 7,758.72/x
3. Step 3: Cross multiply
   12,477.60x = 17,201.52 × 7,758.72
4. Step 4: Simplify right side
   12,477.60x = 133,461,777.25
5. Step 5: Solve for x
   x = 133,461,777.25/12,477.60
6. Step 6: Final answer
   x = 10,696.11