Finding the Fourth Proportional to 8,991.48, 13,488.48 and 3,146.76

Step by Step Solution

1. Step 1: Write the proportion equation
   8,991.48 : 13,488.48 = 3,146.76 : x
2. Step 2: Convert to fraction form
   8,991.48/13,488.48 = 3,146.76/x
3. Step 3: Cross multiply
   8,991.48x = 13,488.48 × 3,146.76
4. Step 4: Simplify right side
   8,991.48x = 42,445,009.32
5. Step 5: Solve for x
   x = 42,445,009.32/8,991.48
6. Step 6: Final answer
   x = 4,720.58