Finding the Fourth Proportional to 7,370.30, 10,153.72 and 5,128.32

Step by Step Solution

1. Step 1: Write the proportion equation
   7,370.30 : 10,153.72 = 5,128.32 : x
2. Step 2: Convert to fraction form
   7,370.30/10,153.72 = 5,128.32/x
3. Step 3: Cross multiply
   7,370.30x = 10,153.72 × 5,128.32
4. Step 4: Simplify right side
   7,370.30x = 52,071,499.71
5. Step 5: Solve for x
   x = 52,071,499.71/7,370.30
6. Step 6: Final answer
   x = 7,065.04