Finding the Fourth Proportional to 7,918.50, 10,927.74 and 5,128.86

Step by Step Solution

1. Step 1: Write the proportion equation
   7,918.50 : 10,927.74 = 5,128.86 : x
2. Step 2: Convert to fraction form
   7,918.50/10,927.74 = 5,128.86/x
3. Step 3: Cross multiply
   7,918.50x = 10,927.74 × 5,128.86
4. Step 4: Simplify right side
   7,918.50x = 56,046,848.58
5. Step 5: Solve for x
   x = 56,046,848.58/7,918.50
6. Step 6: Final answer
   x = 7,077.96