Finding the Fourth Proportional to 10,513.77, 15,772.91 and 3,118.74

Step by Step Solution

1. Step 1: Write the proportion equation
   10,513.77 : 15,772.91 = 3,118.74 : x
2. Step 2: Convert to fraction form
   10,513.77/15,772.91 = 3,118.74/x
3. Step 3: Cross multiply
   10,513.77x = 15,772.91 × 3,118.74
4. Step 4: Simplify right side
   10,513.77x = 49,191,510.88
5. Step 5: Solve for x
   x = 49,191,510.88/10,513.77
6. Step 6: Final answer
   x = 4,678.77