Finding the Fourth Proportional to 13,448, 18,558.72 and 7,858.88

Step by Step Solution

1. Step 1: Write the proportion equation
   13,448 : 18,558.72 = 7,858.88 : x
2. Step 2: Convert to fraction form
   13,448/18,558.72 = 7,858.88/x
3. Step 3: Cross multiply
   13,448x = 18,558.72 × 7,858.88
4. Step 4: Simplify right side
   13,448x = 145,850,753.43
5. Step 5: Solve for x
   x = 145,850,753.43/13,448
6. Step 6: Final answer
   x = 10,845.53