Finding the Fourth Proportional to 37,155.12, 55,730.72 and 12,191.88

Step by Step Solution

1. Step 1: Write the proportion equation
   37,155.12 : 55,730.72 = 12,191.88 : x
2. Step 2: Convert to fraction form
   37,155.12/55,730.72 = 12,191.88/x
3. Step 3: Cross multiply
   37,155.12x = 55,730.72 × 12,191.88
4. Step 4: Simplify right side
   37,155.12x = 679,462,250.55
5. Step 5: Solve for x
   x = 679,462,250.55/37,155.12
6. Step 6: Final answer
   x = 18,287.18