Finding the Fourth Proportional to 37,145.79, 55,720.51 and 12,175.72

Step by Step Solution

1. Step 1: Write the proportion equation
   37,145.79 : 55,720.51 = 12,175.72 : x
2. Step 2: Convert to fraction form
   37,145.79/55,720.51 = 12,175.72/x
3. Step 3: Cross multiply
   37,145.79x = 55,720.51 × 12,175.72
4. Step 4: Simplify right side
   37,145.79x = 678,437,158.28
5. Step 5: Solve for x
   x = 678,437,158.28/37,145.79
6. Step 6: Final answer
   x = 18,264.17