Finding the Fourth Proportional to 37,056.62, 55,590.72 and 12,090.90

Step by Step Solution

1. Step 1: Write the proportion equation
   37,056.62 : 55,590.72 = 12,090.90 : x
2. Step 2: Convert to fraction form
   37,056.62/55,590.72 = 12,090.90/x
3. Step 3: Cross multiply
   37,056.62x = 55,590.72 × 12,090.90
4. Step 4: Simplify right side
   37,056.62x = 672,141,836.45
5. Step 5: Solve for x
   x = 672,141,836.45/37,056.62
6. Step 6: Final answer
   x = 18,138.24