Finding the Fourth Proportional to 8,971.89, 12,381.01 and 4,992.76

Step by Step Solution

1. Step 1: Write the proportion equation
   8,971.89 : 12,381.01 = 4,992.76 : x
2. Step 2: Convert to fraction form
   8,971.89/12,381.01 = 4,992.76/x
3. Step 3: Cross multiply
   8,971.89x = 12,381.01 × 4,992.76
4. Step 4: Simplify right side
   8,971.89x = 61,815,411.49
5. Step 5: Solve for x
   x = 61,815,411.49/8,971.89
6. Step 6: Final answer
   x = 6,889.90