Finding the Fourth Proportional to 37,384.32, 56,086.56 and 12,428.40

Step by Step Solution

1. Step 1: Write the proportion equation
   37,384.32 : 56,086.56 = 12,428.40 : x
2. Step 2: Convert to fraction form
   37,384.32/56,086.56 = 12,428.40/x
3. Step 3: Cross multiply
   37,384.32x = 56,086.56 × 12,428.40
4. Step 4: Simplify right side
   37,384.32x = 697,066,202.30
5. Step 5: Solve for x
   x = 697,066,202.30/37,384.32
6. Step 6: Final answer
   x = 18,645.95