Finding the Fourth Proportional to 11,810.76, 17,705.54 and 10,783.55

Step by Step Solution

1. Step 1: Write the proportion equation
   11,810.76 : 17,705.54 = 10,783.55 : x
2. Step 2: Convert to fraction form
   11,810.76/17,705.54 = 10,783.55/x
3. Step 3: Cross multiply
   11,810.76x = 17,705.54 × 10,783.55
4. Step 4: Simplify right side
   11,810.76x = 190,928,433.42
5. Step 5: Solve for x
   x = 190,928,433.42/11,810.76
6. Step 6: Final answer
   x = 16,165.63