Finding the Fourth Proportional to 13,799.58, 19,043.91 and 7,831.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,799.58 : 19,043.91 = 7,831.50 : x
2. Step 2: Convert to fraction form
   13,799.58/19,043.91 = 7,831.50/x
3. Step 3: Cross multiply
   13,799.58x = 19,043.91 × 7,831.50
4. Step 4: Simplify right side
   13,799.58x = 149,142,381.17
5. Step 5: Solve for x
   x = 149,142,381.17/13,799.58
6. Step 6: Final answer
   x = 10,807.75