Finding the Fourth Proportional to 9,991.65, 14,974.91 and 5,300.07

Step by Step Solution

1. Step 1: Write the proportion equation
   9,991.65 : 14,974.91 = 5,300.07 : x
2. Step 2: Convert to fraction form
   9,991.65/14,974.91 = 5,300.07/x
3. Step 3: Cross multiply
   9,991.65x = 14,974.91 × 5,300.07
4. Step 4: Simplify right side
   9,991.65x = 79,368,008.46
5. Step 5: Solve for x
   x = 79,368,008.46/9,991.65
6. Step 6: Final answer
   x = 7,943.43