Finding the Fourth Proportional to 9,990.95, 14,995.67 and 5,064.05

Step by Step Solution

1. Step 1: Write the proportion equation
   9,990.95 : 14,995.67 = 5,064.05 : x
2. Step 2: Convert to fraction form
   9,990.95/14,995.67 = 5,064.05/x
3. Step 3: Cross multiply
   9,990.95x = 14,995.67 × 5,064.05
4. Step 4: Simplify right side
   9,990.95x = 75,938,834.83
5. Step 5: Solve for x
   x = 75,938,834.83/9,990.95
6. Step 6: Final answer
   x = 7,600.77