Finding the Fourth Proportional to 9,978.44, 14,976.86 and 5,051.57

Step by Step Solution

1. Step 1: Write the proportion equation
   9,978.44 : 14,976.86 = 5,051.57 : x
2. Step 2: Convert to fraction form
   9,978.44/14,976.86 = 5,051.57/x
3. Step 3: Cross multiply
   9,978.44x = 14,976.86 × 5,051.57
4. Step 4: Simplify right side
   9,978.44x = 75,656,556.53
5. Step 5: Solve for x
   x = 75,656,556.53/9,978.44
6. Step 6: Final answer
   x = 7,582.01