Finding the Fourth Proportional to 12,945.51, 19,426.91 and 7,106.22

Step by Step Solution

1. Step 1: Write the proportion equation
   12,945.51 : 19,426.91 = 7,106.22 : x
2. Step 2: Convert to fraction form
   12,945.51/19,426.91 = 7,106.22/x
3. Step 3: Cross multiply
   12,945.51x = 19,426.91 × 7,106.22
4. Step 4: Simplify right side
   12,945.51x = 138,051,860.85
5. Step 5: Solve for x
   x = 138,051,860.85/12,945.51
6. Step 6: Final answer
   x = 10,664.07