Finding the Fourth Proportional to 11,907.86, 17,855.31 and 4,980.74

Step by Step Solution

1. Step 1: Write the proportion equation
   11,907.86 : 17,855.31 = 4,980.74 : x
2. Step 2: Convert to fraction form
   11,907.86/17,855.31 = 4,980.74/x
3. Step 3: Cross multiply
   11,907.86x = 17,855.31 × 4,980.74
4. Step 4: Simplify right side
   11,907.86x = 88,932,656.73
5. Step 5: Solve for x
   x = 88,932,656.73/11,907.86
6. Step 6: Final answer
   x = 7,468.40