Finding the Fourth Proportional to 12,994, 19,504.12 and 7,155.60

Step by Step Solution

1. Step 1: Write the proportion equation
   12,994 : 19,504.12 = 7,155.60 : x
2. Step 2: Convert to fraction form
   12,994/19,504.12 = 7,155.60/x
3. Step 3: Cross multiply
   12,994x = 19,504.12 × 7,155.60
4. Step 4: Simplify right side
   12,994x = 139,563,681.07
5. Step 5: Solve for x
   x = 139,563,681.07/12,994
6. Step 6: Final answer
   x = 10,740.62