Finding the Fourth Proportional to 9,319.18, 12,860.72 and 5,070.49

Step by Step Solution

1. Step 1: Write the proportion equation
   9,319.18 : 12,860.72 = 5,070.49 : x
2. Step 2: Convert to fraction form
   9,319.18/12,860.72 = 5,070.49/x
3. Step 3: Cross multiply
   9,319.18x = 12,860.72 × 5,070.49
4. Step 4: Simplify right side
   9,319.18x = 65,210,152.15
5. Step 5: Solve for x
   x = 65,210,152.15/9,319.18
6. Step 6: Final answer
   x = 6,997.41