Finding the Fourth Proportional to 13,878.72, 19,152.60 and 7,591.08

Step by Step Solution

1. Step 1: Write the proportion equation
   13,878.72 : 19,152.60 = 7,591.08 : x
2. Step 2: Convert to fraction form
   13,878.72/19,152.60 = 7,591.08/x
3. Step 3: Cross multiply
   13,878.72x = 19,152.60 × 7,591.08
4. Step 4: Simplify right side
   13,878.72x = 145,388,918.81
5. Step 5: Solve for x
   x = 145,388,918.81/13,878.72
6. Step 6: Final answer
   x = 10,475.67