Finding the Fourth Proportional to 8,980.58, 12,394.35 and 5,153.72

Step by Step Solution

1. Step 1: Write the proportion equation
   8,980.58 : 12,394.35 = 5,153.72 : x
2. Step 2: Convert to fraction form
   8,980.58/12,394.35 = 5,153.72/x
3. Step 3: Cross multiply
   8,980.58x = 12,394.35 × 5,153.72
4. Step 4: Simplify right side
   8,980.58x = 63,876,947.51
5. Step 5: Solve for x
   x = 63,876,947.51/8,980.58
6. Step 6: Final answer
   x = 7,112.79