Finding the Fourth Proportional to 12,705.33, 19,039.83 and 7,147.02

Step by Step Solution

1. Step 1: Write the proportion equation
   12,705.33 : 19,039.83 = 7,147.02 : x
2. Step 2: Convert to fraction form
   12,705.33/19,039.83 = 7,147.02/x
3. Step 3: Cross multiply
   12,705.33x = 19,039.83 × 7,147.02
4. Step 4: Simplify right side
   12,705.33x = 136,078,045.81
5. Step 5: Solve for x
   x = 136,078,045.81/12,705.33
6. Step 6: Final answer
   x = 10,710.31