Finding the Fourth Proportional to 12,739.02, 19,109.15 and 5,343.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,739.02 : 19,109.15 = 5,343.72 : x
2. Step 2: Convert to fraction form
   12,739.02/19,109.15 = 5,343.72/x
3. Step 3: Cross multiply
   12,739.02x = 19,109.15 × 5,343.72
4. Step 4: Simplify right side
   12,739.02x = 102,113,920.32
5. Step 5: Solve for x
   x = 102,113,920.32/12,739.02
6. Step 6: Final answer
   x = 8,015.84