Finding the Fourth Proportional to 9,978.88, 14,965.08 and 4,713.08

Step by Step Solution

1. Step 1: Write the proportion equation
   9,978.88 : 14,965.08 = 4,713.08 : x
2. Step 2: Convert to fraction form
   9,978.88/14,965.08 = 4,713.08/x
3. Step 3: Cross multiply
   9,978.88x = 14,965.08 × 4,713.08
4. Step 4: Simplify right side
   9,978.88x = 70,531,619.25
5. Step 5: Solve for x
   x = 70,531,619.25/9,978.88
6. Step 6: Final answer
   x = 7,068.09