Finding the Fourth Proportional to 12,913.32, 19,368.15 and 4,147.10

Step by Step Solution

1. Step 1: Write the proportion equation
   12,913.32 : 19,368.15 = 4,147.10 : x
2. Step 2: Convert to fraction form
   12,913.32/19,368.15 = 4,147.10/x
3. Step 3: Cross multiply
   12,913.32x = 19,368.15 × 4,147.10
4. Step 4: Simplify right side
   12,913.32x = 80,321,558.02
5. Step 5: Solve for x
   x = 80,321,558.02/12,913.32
6. Step 6: Final answer
   x = 6,220.05