Finding the Fourth Proportional to 37,688.88, 56,539.46 and 12,730.42

Step by Step Solution

1. Step 1: Write the proportion equation
   37,688.88 : 56,539.46 = 12,730.42 : x
2. Step 2: Convert to fraction form
   37,688.88/56,539.46 = 12,730.42/x
3. Step 3: Cross multiply
   37,688.88x = 56,539.46 × 12,730.42
4. Step 4: Simplify right side
   37,688.88x = 719,770,962.85
5. Step 5: Solve for x
   x = 719,770,962.85/37,688.88
6. Step 6: Final answer
   x = 19,097.70