Finding the Fourth Proportional to 12,655.96, 17,463.72 and 7,620.10

Step by Step Solution

1. Step 1: Write the proportion equation
   12,655.96 : 17,463.72 = 7,620.10 : x
2. Step 2: Convert to fraction form
   12,655.96/17,463.72 = 7,620.10/x
3. Step 3: Cross multiply
   12,655.96x = 17,463.72 × 7,620.10
4. Step 4: Simplify right side
   12,655.96x = 133,075,292.77
5. Step 5: Solve for x
   x = 133,075,292.77/12,655.96
6. Step 6: Final answer
   x = 10,514.83