Finding the Fourth Proportional to 22,191.63, 30,621.69 and 13,115.93

Step by Step Solution

1. Step 1: Write the proportion equation
   22,191.63 : 30,621.69 = 13,115.93 : x
2. Step 2: Convert to fraction form
   22,191.63/30,621.69 = 13,115.93/x
3. Step 3: Cross multiply
   22,191.63x = 30,621.69 × 13,115.93
4. Step 4: Simplify right side
   22,191.63x = 401,631,789.41
5. Step 5: Solve for x
   x = 401,631,789.41/22,191.63
6. Step 6: Final answer
   x = 18,098.34