Finding the Fourth Proportional to 37,090.56, 55,643 and 12,123.88

Step by Step Solution

1. Step 1: Write the proportion equation
   37,090.56 : 55,643 = 12,123.88 : x
2. Step 2: Convert to fraction form
   37,090.56/55,643 = 12,123.88/x
3. Step 3: Cross multiply
   37,090.56x = 55,643 × 12,123.88
4. Step 4: Simplify right side
   37,090.56x = 674,609,054.84
5. Step 5: Solve for x
   x = 674,609,054.84/37,090.56
6. Step 6: Final answer
   x = 18,188.16