Finding the Fourth Proportional to 55,818.72, 83,715.12 and 20,774.88

Step by Step Solution

1. Step 1: Write the proportion equation
   55,818.72 : 83,715.12 = 20,774.88 : x
2. Step 2: Convert to fraction form
   55,818.72/83,715.12 = 20,774.88/x
3. Step 3: Cross multiply
   55,818.72x = 83,715.12 × 20,774.88
4. Step 4: Simplify right side
   55,818.72x = 1,739,171,572.19
5. Step 5: Solve for x
   x = 1,739,171,572.19/55,818.72
6. Step 6: Final answer
   x = 31,157.50