Finding the Fourth Proportional to 10,978.93, 15,145.68 and 10,554.58

Step by Step Solution

1. Step 1: Write the proportion equation
   10,978.93 : 15,145.68 = 10,554.58 : x
2. Step 2: Convert to fraction form
   10,978.93/15,145.68 = 10,554.58/x
3. Step 3: Cross multiply
   10,978.93x = 15,145.68 × 10,554.58
4. Step 4: Simplify right side
   10,978.93x = 159,856,291.21
5. Step 5: Solve for x
   x = 159,856,291.21/10,978.93
6. Step 6: Final answer
   x = 14,560.28