Finding the Fourth Proportional to 9,918.83, 14,861.84 and 4,978.03

Step by Step Solution

1. Step 1: Write the proportion equation
   9,918.83 : 14,861.84 = 4,978.03 : x
2. Step 2: Convert to fraction form
   9,918.83/14,861.84 = 4,978.03/x
3. Step 3: Cross multiply
   9,918.83x = 14,861.84 × 4,978.03
4. Step 4: Simplify right side
   9,918.83x = 73,982,685.38
5. Step 5: Solve for x
   x = 73,982,685.38/9,918.83
6. Step 6: Final answer
   x = 7,458.81