Finding the Fourth Proportional to 13,131.92, 19,700.12 and 4,812.56

Step by Step Solution

1. Step 1: Write the proportion equation
   13,131.92 : 19,700.12 = 4,812.56 : x
2. Step 2: Convert to fraction form
   13,131.92/19,700.12 = 4,812.56/x
3. Step 3: Cross multiply
   13,131.92x = 19,700.12 × 4,812.56
4. Step 4: Simplify right side
   13,131.92x = 94,808,009.51
5. Step 5: Solve for x
   x = 94,808,009.51/13,131.92
6. Step 6: Final answer
   x = 7,219.66