Finding the Fourth Proportional to 9,911.42, 14,763.84 and 9,385.50

Step by Step Solution

1. Step 1: Write the proportion equation
   9,911.42 : 14,763.84 = 9,385.50 : x
2. Step 2: Convert to fraction form
   9,911.42/14,763.84 = 9,385.50/x
3. Step 3: Cross multiply
   9,911.42x = 14,763.84 × 9,385.50
4. Step 4: Simplify right side
   9,911.42x = 138,566,020.32
5. Step 5: Solve for x
   x = 138,566,020.32/9,911.42
6. Step 6: Final answer
   x = 13,980.44