Finding the Fourth Proportional to 13,188.15, 19,785.60 and 9,300.15

Step by Step Solution

1. Step 1: Write the proportion equation
   13,188.15 : 19,785.60 = 9,300.15 : x
2. Step 2: Convert to fraction form
   13,188.15/19,785.60 = 9,300.15/x
3. Step 3: Cross multiply
   13,188.15x = 19,785.60 × 9,300.15
4. Step 4: Simplify right side
   13,188.15x = 184,009,047.84
5. Step 5: Solve for x
   x = 184,009,047.84/13,188.15
6. Step 6: Final answer
   x = 13,952.61