Finding the Fourth Proportional to 58,638.16, 80,919.74 and 31,780.42

Step by Step Solution

1. Step 1: Write the proportion equation
   58,638.16 : 80,919.74 = 31,780.42 : x
2. Step 2: Convert to fraction form
   58,638.16/80,919.74 = 31,780.42/x
3. Step 3: Cross multiply
   58,638.16x = 80,919.74 × 31,780.42
4. Step 4: Simplify right side
   58,638.16x = 2,571,663,323.49
5. Step 5: Solve for x
   x = 2,571,663,323.49/58,638.16
6. Step 6: Final answer
   x = 43,856.48