Finding the Fourth Proportional to 9,980.91, 14,973.72 and 3,407.16

Step by Step Solution

1. Step 1: Write the proportion equation
   9,980.91 : 14,973.72 = 3,407.16 : x
2. Step 2: Convert to fraction form
   9,980.91/14,973.72 = 3,407.16/x
3. Step 3: Cross multiply
   9,980.91x = 14,973.72 × 3,407.16
4. Step 4: Simplify right side
   9,980.91x = 51,017,859.84
5. Step 5: Solve for x
   x = 51,017,859.84/9,980.91
6. Step 6: Final answer
   x = 5,111.54