Finding the Fourth Proportional to 51,820.32, 77,735.34 and 20,658

Step by Step Solution

1. Step 1: Write the proportion equation
   51,820.32 : 77,735.34 = 20,658 : x
2. Step 2: Convert to fraction form
   51,820.32/77,735.34 = 20,658/x
3. Step 3: Cross multiply
   51,820.32x = 77,735.34 × 20,658
4. Step 4: Simplify right side
   51,820.32x = 1,605,856,653.72
5. Step 5: Solve for x
   x = 1,605,856,653.72/51,820.32
6. Step 6: Final answer
   x = 30,988.94