Finding the Fourth Proportional to 9,320.88, 13,978.35 and 3,079.74

Step by Step Solution

1. Step 1: Write the proportion equation
   9,320.88 : 13,978.35 = 3,079.74 : x
2. Step 2: Convert to fraction form
   9,320.88/13,978.35 = 3,079.74/x
3. Step 3: Cross multiply
   9,320.88x = 13,978.35 × 3,079.74
4. Step 4: Simplify right side
   9,320.88x = 43,049,683.63
5. Step 5: Solve for x
   x = 43,049,683.63/9,320.88
6. Step 6: Final answer
   x = 4,618.63