Finding the Fourth Proportional to 12,852.32, 17,736.59 and 7,187.30

Step by Step Solution

1. Step 1: Write the proportion equation
   12,852.32 : 17,736.59 = 7,187.30 : x
2. Step 2: Convert to fraction form
   12,852.32/17,736.59 = 7,187.30/x
3. Step 3: Cross multiply
   12,852.32x = 17,736.59 × 7,187.30
4. Step 4: Simplify right side
   12,852.32x = 127,478,248.44
5. Step 5: Solve for x
   x = 127,478,248.44/12,852.32
6. Step 6: Final answer
   x = 9,918.70