Finding the Fourth Proportional to 12,100.63, 18,151.62 and 3,781.80

Step by Step Solution

1. Step 1: Write the proportion equation
   12,100.63 : 18,151.62 = 3,781.80 : x
2. Step 2: Convert to fraction form
   12,100.63/18,151.62 = 3,781.80/x
3. Step 3: Cross multiply
   12,100.63x = 18,151.62 × 3,781.80
4. Step 4: Simplify right side
   12,100.63x = 68,645,796.52
5. Step 5: Solve for x
   x = 68,645,796.52/12,100.63
6. Step 6: Final answer
   x = 5,672.91