Finding the Fourth Proportional to 8,978.58, 13,461.80 and 3,132

Step by Step Solution

1. Step 1: Write the proportion equation
   8,978.58 : 13,461.80 = 3,132 : x
2. Step 2: Convert to fraction form
   8,978.58/13,461.80 = 3,132/x
3. Step 3: Cross multiply
   8,978.58x = 13,461.80 × 3,132
4. Step 4: Simplify right side
   8,978.58x = 42,162,341.94
5. Step 5: Solve for x
   x = 42,162,341.94/8,978.58
6. Step 6: Final answer
   x = 4,695.88