Finding the Fourth Proportional to 12,783.09, 17,636.10 and 7,402.59

Step by Step Solution

1. Step 1: Write the proportion equation
   12,783.09 : 17,636.10 = 7,402.59 : x
2. Step 2: Convert to fraction form
   12,783.09/17,636.10 = 7,402.59/x
3. Step 3: Cross multiply
   12,783.09x = 17,636.10 × 7,402.59
4. Step 4: Simplify right side
   12,783.09x = 130,552,817.50
5. Step 5: Solve for x
   x = 130,552,817.50/12,783.09
6. Step 6: Final answer
   x = 10,212.93