Finding the Fourth Proportional to 33,690.56, 50,432.16 and 21,978.56

Step by Step Solution

1. Step 1: Write the proportion equation
   33,690.56 : 50,432.16 = 21,978.56 : x
2. Step 2: Convert to fraction form
   33,690.56/50,432.16 = 21,978.56/x
3. Step 3: Cross multiply
   33,690.56x = 50,432.16 × 21,978.56
4. Step 4: Simplify right side
   33,690.56x = 1,108,426,254.49
5. Step 5: Solve for x
   x = 1,108,426,254.49/33,690.56
6. Step 6: Final answer
   x = 32,900.20