Finding the Fourth Proportional to 13,388.16, 18,482.38 and 9,430.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,388.16 : 18,482.38 = 9,430.50 : x
2. Step 2: Convert to fraction form
   13,388.16/18,482.38 = 9,430.50/x
3. Step 3: Cross multiply
   13,388.16x = 18,482.38 × 9,430.50
4. Step 4: Simplify right side
   13,388.16x = 174,298,084.59
5. Step 5: Solve for x
   x = 174,298,084.59/13,388.16
6. Step 6: Final answer
   x = 13,018.82