Finding the Fourth Proportional to 11,931.86, 17,903.52 and 4,917

Step by Step Solution

1. Step 1: Write the proportion equation
   11,931.86 : 17,903.52 = 4,917 : x
2. Step 2: Convert to fraction form
   11,931.86/17,903.52 = 4,917/x
3. Step 3: Cross multiply
   11,931.86x = 17,903.52 × 4,917
4. Step 4: Simplify right side
   11,931.86x = 88,031,607.84
5. Step 5: Solve for x
   x = 88,031,607.84/11,931.86
6. Step 6: Final answer
   x = 7,377.86