Finding the Fourth Proportional to 8,969.86, 12,376.98 and 4,990.96

Step by Step Solution

1. Step 1: Write the proportion equation
   8,969.86 : 12,376.98 = 4,990.96 : x
2. Step 2: Convert to fraction form
   8,969.86/12,376.98 = 4,990.96/x
3. Step 3: Cross multiply
   8,969.86x = 12,376.98 × 4,990.96
4. Step 4: Simplify right side
   8,969.86x = 61,773,012.10
5. Step 5: Solve for x
   x = 61,773,012.10/8,969.86
6. Step 6: Final answer
   x = 6,886.73