Finding the Fourth Proportional to 12,719.74, 19,055.01 and 7,156.18

Step by Step Solution

1. Step 1: Write the proportion equation
   12,719.74 : 19,055.01 = 7,156.18 : x
2. Step 2: Convert to fraction form
   12,719.74/19,055.01 = 7,156.18/x
3. Step 3: Cross multiply
   12,719.74x = 19,055.01 × 7,156.18
4. Step 4: Simplify right side
   12,719.74x = 136,361,081.46
5. Step 5: Solve for x
   x = 136,361,081.46/12,719.74
6. Step 6: Final answer
   x = 10,720.43