Finding the Fourth Proportional to 37,109.78, 55,672.45 and 12,147.86

Step by Step Solution

1. Step 1: Write the proportion equation
   37,109.78 : 55,672.45 = 12,147.86 : x
2. Step 2: Convert to fraction form
   37,109.78/55,672.45 = 12,147.86/x
3. Step 3: Cross multiply
   37,109.78x = 55,672.45 × 12,147.86
4. Step 4: Simplify right side
   37,109.78x = 676,301,128.46
5. Step 5: Solve for x
   x = 676,301,128.46/37,109.78
6. Step 6: Final answer
   x = 18,224.34