Finding the Fourth Proportional to 37,602.56, 56,402.78 and 12,644.03

Step by Step Solution

1. Step 1: Write the proportion equation
   37,602.56 : 56,402.78 = 12,644.03 : x
2. Step 2: Convert to fraction form
   37,602.56/56,402.78 = 12,644.03/x
3. Step 3: Cross multiply
   37,602.56x = 56,402.78 × 12,644.03
4. Step 4: Simplify right side
   37,602.56x = 713,158,097.17
5. Step 5: Solve for x
   x = 713,158,097.17/37,602.56
6. Step 6: Final answer
   x = 18,965.68