Finding the Fourth Proportional to 12,783.51, 19,171.71 and 5,383.62

Step by Step Solution

1. Step 1: Write the proportion equation
   12,783.51 : 19,171.71 = 5,383.62 : x
2. Step 2: Convert to fraction form
   12,783.51/19,171.71 = 5,383.62/x
3. Step 3: Cross multiply
   12,783.51x = 19,171.71 × 5,383.62
4. Step 4: Simplify right side
   12,783.51x = 103,213,201.39
5. Step 5: Solve for x
   x = 103,213,201.39/12,783.51
6. Step 6: Final answer
   x = 8,073.93