Finding the Fourth Proportional to 12,703.30, 19,036.79 and 7,144.98

Step by Step Solution

1. Step 1: Write the proportion equation
   12,703.30 : 19,036.79 = 7,144.98 : x
2. Step 2: Convert to fraction form
   12,703.30/19,036.79 = 7,144.98/x
3. Step 3: Cross multiply
   12,703.30x = 19,036.79 × 7,144.98
4. Step 4: Simplify right side
   12,703.30x = 136,017,483.81
5. Step 5: Solve for x
   x = 136,017,483.81/12,703.30
6. Step 6: Final answer
   x = 10,707.26