Finding the Fourth Proportional to 37,978.32, 52,405.56 and 20,981.55

Step by Step Solution

1. Step 1: Write the proportion equation
   37,978.32 : 52,405.56 = 20,981.55 : x
2. Step 2: Convert to fraction form
   37,978.32/52,405.56 = 20,981.55/x
3. Step 3: Cross multiply
   37,978.32x = 52,405.56 × 20,981.55
4. Step 4: Simplify right side
   37,978.32x = 1,099,549,877.42
5. Step 5: Solve for x
   x = 1,099,549,877.42/37,978.32
6. Step 6: Final answer
   x = 28,952.04