Finding the Fourth Proportional to 31,095.16, 46,642.20 and 7,720.72

Step by Step Solution

1. Step 1: Write the proportion equation
   31,095.16 : 46,642.20 = 7,720.72 : x
2. Step 2: Convert to fraction form
   31,095.16/46,642.20 = 7,720.72/x
3. Step 3: Cross multiply
   31,095.16x = 46,642.20 × 7,720.72
4. Step 4: Simplify right side
   31,095.16x = 360,111,366.38
5. Step 5: Solve for x
   x = 360,111,366.38/31,095.16
6. Step 6: Final answer
   x = 11,580.95