Finding the Fourth Proportional to 13,085.46, 19,611.18 and 5,290.02

Step by Step Solution

1. Step 1: Write the proportion equation
   13,085.46 : 19,611.18 = 5,290.02 : x
2. Step 2: Convert to fraction form
   13,085.46/19,611.18 = 5,290.02/x
3. Step 3: Cross multiply
   13,085.46x = 19,611.18 × 5,290.02
4. Step 4: Simplify right side
   13,085.46x = 103,743,534.42
5. Step 5: Solve for x
   x = 103,743,534.42/13,085.46
6. Step 6: Final answer
   x = 7,928.15