Finding the Fourth Proportional to 10,000.69, 14,990.78 and 5,055.34

Step by Step Solution

1. Step 1: Write the proportion equation
   10,000.69 : 14,990.78 = 5,055.34 : x
2. Step 2: Convert to fraction form
   10,000.69/14,990.78 = 5,055.34/x
3. Step 3: Cross multiply
   10,000.69x = 14,990.78 × 5,055.34
4. Step 4: Simplify right side
   10,000.69x = 75,783,489.77
5. Step 5: Solve for x
   x = 75,783,489.77/10,000.69
6. Step 6: Final answer
   x = 7,577.83