Finding the Fourth Proportional to 9,141.90, 12,611.47 and 5,954.05

Step by Step Solution

1. Step 1: Write the proportion equation
   9,141.90 : 12,611.47 = 5,954.05 : x
2. Step 2: Convert to fraction form
   9,141.90/12,611.47 = 5,954.05/x
3. Step 3: Cross multiply
   9,141.90x = 12,611.47 × 5,954.05
4. Step 4: Simplify right side
   9,141.90x = 75,089,322.95
5. Step 5: Solve for x
   x = 75,089,322.95/9,141.90
6. Step 6: Final answer
   x = 8,213.75