Finding the Fourth Proportional to 7,521.31, 10,379.28 and 4,164.05

Step by Step Solution

1. Step 1: Write the proportion equation
   7,521.31 : 10,379.28 = 4,164.05 : x
2. Step 2: Convert to fraction form
   7,521.31/10,379.28 = 4,164.05/x
3. Step 3: Cross multiply
   7,521.31x = 10,379.28 × 4,164.05
4. Step 4: Simplify right side
   7,521.31x = 43,219,840.88
5. Step 5: Solve for x
   x = 43,219,840.88/7,521.31
6. Step 6: Final answer
   x = 5,746.32