Finding the Fourth Proportional to 6,985.95, 10,485.82 and 5,131.86

Step by Step Solution

1. Step 1: Write the proportion equation
   6,985.95 : 10,485.82 = 5,131.86 : x
2. Step 2: Convert to fraction form
   6,985.95/10,485.82 = 5,131.86/x
3. Step 3: Cross multiply
   6,985.95x = 10,485.82 × 5,131.86
4. Step 4: Simplify right side
   6,985.95x = 53,811,760.23
5. Step 5: Solve for x
   x = 53,811,760.23/6,985.95
6. Step 6: Final answer
   x = 7,702.86