Finding the Fourth Proportional to 10,128.90, 13,976.10 and 5,652.30

Step by Step Solution

1. Step 1: Write the proportion equation
   10,128.90 : 13,976.10 = 5,652.30 : x
2. Step 2: Convert to fraction form
   10,128.90/13,976.10 = 5,652.30/x
3. Step 3: Cross multiply
   10,128.90x = 13,976.10 × 5,652.30
4. Step 4: Simplify right side
   10,128.90x = 78,997,110.03
5. Step 5: Solve for x
   x = 78,997,110.03/10,128.90
6. Step 6: Final answer
   x = 7,799.18