Finding the Fourth Proportional to 37,456.63, 56,120.98 and 20,603.74

Step by Step Solution

1. Step 1: Write the proportion equation
   37,456.63 : 56,120.98 = 20,603.74 : x
2. Step 2: Convert to fraction form
   37,456.63/56,120.98 = 20,603.74/x
3. Step 3: Cross multiply
   37,456.63x = 56,120.98 × 20,603.74
4. Step 4: Simplify right side
   37,456.63x = 1,156,302,080.47
5. Step 5: Solve for x
   x = 1,156,302,080.47/37,456.63
6. Step 6: Final answer
   x = 30,870.42