Finding the Fourth Proportional to 11,698.86, 17,560.44 and 7,830.30

Step by Step Solution

1. Step 1: Write the proportion equation
   11,698.86 : 17,560.44 = 7,830.30 : x
2. Step 2: Convert to fraction form
   11,698.86/17,560.44 = 7,830.30/x
3. Step 3: Cross multiply
   11,698.86x = 17,560.44 × 7,830.30
4. Step 4: Simplify right side
   11,698.86x = 137,503,513.33
5. Step 5: Solve for x
   x = 137,503,513.33/11,698.86
6. Step 6: Final answer
   x = 11,753.58