Finding the Fourth Proportional to 37,688.25, 52,012.12 and 20,921.25

Step by Step Solution

1. Step 1: Write the proportion equation
   37,688.25 : 52,012.12 = 20,921.25 : x
2. Step 2: Convert to fraction form
   37,688.25/52,012.12 = 20,921.25/x
3. Step 3: Cross multiply
   37,688.25x = 52,012.12 × 20,921.25
4. Step 4: Simplify right side
   37,688.25x = 1,088,158,565.55
5. Step 5: Solve for x
   x = 1,088,158,565.55/37,688.25
6. Step 6: Final answer
   x = 28,872.62