Finding the Fourth Proportional to 10,861.98, 14,982.42 and 8,620.32

Step by Step Solution

1. Step 1: Write the proportion equation
   10,861.98 : 14,982.42 = 8,620.32 : x
2. Step 2: Convert to fraction form
   10,861.98/14,982.42 = 8,620.32/x
3. Step 3: Cross multiply
   10,861.98x = 14,982.42 × 8,620.32
4. Step 4: Simplify right side
   10,861.98x = 129,153,254.77
5. Step 5: Solve for x
   x = 129,153,254.77/10,861.98
6. Step 6: Final answer
   x = 11,890.40