Finding the Fourth Proportional to 7,715.59, 10,646.67 and 5,700.07

Step by Step Solution

1. Step 1: Write the proportion equation
   7,715.59 : 10,646.67 = 5,700.07 : x
2. Step 2: Convert to fraction form
   7,715.59/10,646.67 = 5,700.07/x
3. Step 3: Cross multiply
   7,715.59x = 10,646.67 × 5,700.07
4. Step 4: Simplify right side
   7,715.59x = 60,686,798.95
5. Step 5: Solve for x
   x = 60,686,798.95/7,715.59
6. Step 6: Final answer
   x = 7,865.48