Finding the Fourth Proportional to 8,970.41, 12,379.86 and 4,991.83

Step by Step Solution

1. Step 1: Write the proportion equation
   8,970.41 : 12,379.86 = 4,991.83 : x
2. Step 2: Convert to fraction form
   8,970.41/12,379.86 = 4,991.83/x
3. Step 3: Cross multiply
   8,970.41x = 12,379.86 × 4,991.83
4. Step 4: Simplify right side
   8,970.41x = 61,798,156.54
5. Step 5: Solve for x
   x = 61,798,156.54/8,970.41
6. Step 6: Final answer
   x = 6,889.11