Finding the Fourth Proportional to 37,088.50, 55,641.50 and 12,128.45

Step by Step Solution

1. Step 1: Write the proportion equation
   37,088.50 : 55,641.50 = 12,128.45 : x
2. Step 2: Convert to fraction form
   37,088.50/55,641.50 = 12,128.45/x
3. Step 3: Cross multiply
   37,088.50x = 55,641.50 × 12,128.45
4. Step 4: Simplify right side
   37,088.50x = 674,845,065.96
5. Step 5: Solve for x
   x = 674,845,065.96/37,088.50
6. Step 6: Final answer
   x = 18,195.54