Finding the Fourth Proportional to 11,947.91, 16,484.78 and 7,164.86

Step by Step Solution

1. Step 1: Write the proportion equation
   11,947.91 : 16,484.78 = 7,164.86 : x
2. Step 2: Convert to fraction form
   11,947.91/16,484.78 = 7,164.86/x
3. Step 3: Cross multiply
   11,947.91x = 16,484.78 × 7,164.86
4. Step 4: Simplify right side
   11,947.91x = 118,111,076.32
5. Step 5: Solve for x
   x = 118,111,076.32/11,947.91
6. Step 6: Final answer
   x = 9,885.51