Finding the Fourth Proportional to 12,137.22, 16,737.48 and 7,886.70

Step by Step Solution

1. Step 1: Write the proportion equation
   12,137.22 : 16,737.48 = 7,886.70 : x
2. Step 2: Convert to fraction form
   12,137.22/16,737.48 = 7,886.70/x
3. Step 3: Cross multiply
   12,137.22x = 16,737.48 × 7,886.70
4. Step 4: Simplify right side
   12,137.22x = 132,003,483.52
5. Step 5: Solve for x
   x = 132,003,483.52/12,137.22
6. Step 6: Final answer
   x = 10,875.92