Finding the Fourth Proportional to 9,191.34, 12,683.61 and 4,999.59

Step by Step Solution

1. Step 1: Write the proportion equation
   9,191.34 : 12,683.61 = 4,999.59 : x
2. Step 2: Convert to fraction form
   9,191.34/12,683.61 = 4,999.59/x
3. Step 3: Cross multiply
   9,191.34x = 12,683.61 × 4,999.59
4. Step 4: Simplify right side
   9,191.34x = 63,412,849.72
5. Step 5: Solve for x
   x = 63,412,849.72/9,191.34
6. Step 6: Final answer
   x = 6,899.20