Finding the Fourth Proportional to 10,858.72, 14,985.06 and 5,890.72

Step by Step Solution

1. Step 1: Write the proportion equation
   10,858.72 : 14,985.06 = 5,890.72 : x
2. Step 2: Convert to fraction form
   10,858.72/14,985.06 = 5,890.72/x
3. Step 3: Cross multiply
   10,858.72x = 14,985.06 × 5,890.72
4. Step 4: Simplify right side
   10,858.72x = 88,272,792.64
5. Step 5: Solve for x
   x = 88,272,792.64/10,858.72
6. Step 6: Final answer
   x = 8,129.21