Finding the Fourth Proportional to 12,661.60, 18,993.32 and 4,870.42

Step by Step Solution

1. Step 1: Write the proportion equation
   12,661.60 : 18,993.32 = 4,870.42 : x
2. Step 2: Convert to fraction form
   12,661.60/18,993.32 = 4,870.42/x
3. Step 3: Cross multiply
   12,661.60x = 18,993.32 × 4,870.42
4. Step 4: Simplify right side
   12,661.60x = 92,505,445.59
5. Step 5: Solve for x
   x = 92,505,445.59/12,661.60
6. Step 6: Final answer
   x = 7,305.98