Finding the Fourth Proportional to 7,111.62, 10,646.36 and 5,270.99

Step by Step Solution

1. Step 1: Write the proportion equation
   7,111.62 : 10,646.36 = 5,270.99 : x
2. Step 2: Convert to fraction form
   7,111.62/10,646.36 = 5,270.99/x
3. Step 3: Cross multiply
   7,111.62x = 10,646.36 × 5,270.99
4. Step 4: Simplify right side
   7,111.62x = 56,116,777.51
5. Step 5: Solve for x
   x = 56,116,777.51/7,111.62
6. Step 6: Final answer
   x = 7,890.86