Finding the Fourth Proportional to 9,938.88, 14,903.49 and 5,780.10

Step by Step Solution

1. Step 1: Write the proportion equation
   9,938.88 : 14,903.49 = 5,780.10 : x
2. Step 2: Convert to fraction form
   9,938.88/14,903.49 = 5,780.10/x
3. Step 3: Cross multiply
   9,938.88x = 14,903.49 × 5,780.10
4. Step 4: Simplify right side
   9,938.88x = 86,143,662.55
5. Step 5: Solve for x
   x = 86,143,662.55/9,938.88
6. Step 6: Final answer
   x = 8,667.34