Finding the Fourth Proportional to 37,456.32, 51,687.12 and 20,688

Step by Step Solution

1. Step 1: Write the proportion equation
   37,456.32 : 51,687.12 = 20,688 : x
2. Step 2: Convert to fraction form
   37,456.32/51,687.12 = 20,688/x
3. Step 3: Cross multiply
   37,456.32x = 51,687.12 × 20,688
4. Step 4: Simplify right side
   37,456.32x = 1,069,303,138.56
5. Step 5: Solve for x
   x = 1,069,303,138.56/37,456.32
6. Step 6: Final answer
   x = 28,548.00