Finding the Fourth Proportional to 9,978.86, 14,959.02 and 3,400.50

Step by Step Solution

1. Step 1: Write the proportion equation
   9,978.86 : 14,959.02 = 3,400.50 : x
2. Step 2: Convert to fraction form
   9,978.86/14,959.02 = 3,400.50/x
3. Step 3: Cross multiply
   9,978.86x = 14,959.02 × 3,400.50
4. Step 4: Simplify right side
   9,978.86x = 50,868,147.51
5. Step 5: Solve for x
   x = 50,868,147.51/9,978.86
6. Step 6: Final answer
   x = 5,097.59