Finding the Fourth Proportional to 31,985.96, 47,977.86 and 8,611.52

Step by Step Solution

1. Step 1: Write the proportion equation
   31,985.96 : 47,977.86 = 8,611.52 : x
2. Step 2: Convert to fraction form
   31,985.96/47,977.86 = 8,611.52/x
3. Step 3: Cross multiply
   31,985.96x = 47,977.86 × 8,611.52
4. Step 4: Simplify right side
   31,985.96x = 413,162,300.95
5. Step 5: Solve for x
   x = 413,162,300.95/31,985.96
6. Step 6: Final answer
   x = 12,916.99