Finding the Fourth Proportional to 9,911.30, 14,862.11 and 4,907.88

Step by Step Solution

1. Step 1: Write the proportion equation
   9,911.30 : 14,862.11 = 4,907.88 : x
2. Step 2: Convert to fraction form
   9,911.30/14,862.11 = 4,907.88/x
3. Step 3: Cross multiply
   9,911.30x = 14,862.11 × 4,907.88
4. Step 4: Simplify right side
   9,911.30x = 72,941,427.89
5. Step 5: Solve for x
   x = 72,941,427.89/9,911.30
6. Step 6: Final answer
   x = 7,359.42