Finding the Fourth Proportional to 9,899.39, 14,848.90 and 3,978.88

Step by Step Solution

1. Step 1: Write the proportion equation
   9,899.39 : 14,848.90 = 3,978.88 : x
2. Step 2: Convert to fraction form
   9,899.39/14,848.90 = 3,978.88/x
3. Step 3: Cross multiply
   9,899.39x = 14,848.90 × 3,978.88
4. Step 4: Simplify right side
   9,899.39x = 59,081,991.23
5. Step 5: Solve for x
   x = 59,081,991.23/9,899.39
6. Step 6: Final answer
   x = 5,968.25