Finding the Fourth Proportional to 63,128.39, 87,493.40 and 61,947.41

Step by Step Solution

1. Step 1: Write the proportion equation
   63,128.39 : 87,493.40 = 61,947.41 : x
2. Step 2: Convert to fraction form
   63,128.39/87,493.40 = 61,947.41/x
3. Step 3: Cross multiply
   63,128.39x = 87,493.40 × 61,947.41
4. Step 4: Simplify right side
   63,128.39x = 5,419,988,774.89
5. Step 5: Solve for x
   x = 5,419,988,774.89/63,128.39
6. Step 6: Final answer
   x = 85,856.60