Finding the Fourth Proportional to 10,931.93, 16,397.86 and 4,687.90

Step by Step Solution

1. Step 1: Write the proportion equation
   10,931.93 : 16,397.86 = 4,687.90 : x
2. Step 2: Convert to fraction form
   10,931.93/16,397.86 = 4,687.90/x
3. Step 3: Cross multiply
   10,931.93x = 16,397.86 × 4,687.90
4. Step 4: Simplify right side
   10,931.93x = 76,871,527.89
5. Step 5: Solve for x
   x = 76,871,527.89/10,931.93
6. Step 6: Final answer
   x = 7,031.83