Finding the Fourth Proportional to 13,488.60, 18,611.91 and 7,823.86

Step by Step Solution

1. Step 1: Write the proportion equation
   13,488.60 : 18,611.91 = 7,823.86 : x
2. Step 2: Convert to fraction form
   13,488.60/18,611.91 = 7,823.86/x
3. Step 3: Cross multiply
   13,488.60x = 18,611.91 × 7,823.86
4. Step 4: Simplify right side
   13,488.60x = 145,616,978.17
5. Step 5: Solve for x
   x = 145,616,978.17/13,488.60
6. Step 6: Final answer
   x = 10,795.56