Finding the Fourth Proportional to 7,875.56, 10,868.31 and 4,688.98

Step by Step Solution

1. Step 1: Write the proportion equation
   7,875.56 : 10,868.31 = 4,688.98 : x
2. Step 2: Convert to fraction form
   7,875.56/10,868.31 = 4,688.98/x
3. Step 3: Cross multiply
   7,875.56x = 10,868.31 × 4,688.98
4. Step 4: Simplify right side
   7,875.56x = 50,961,270.27
5. Step 5: Solve for x
   x = 50,961,270.27/7,875.56
6. Step 6: Final answer
   x = 6,470.81