Finding the Fourth Proportional to 7,112.16, 9,816.72 and 4,128.93

Step by Step Solution

1. Step 1: Write the proportion equation
   7,112.16 : 9,816.72 = 4,128.93 : x
2. Step 2: Convert to fraction form
   7,112.16/9,816.72 = 4,128.93/x
3. Step 3: Cross multiply
   7,112.16x = 9,816.72 × 4,128.93
4. Step 4: Simplify right side
   7,112.16x = 40,532,549.71
5. Step 5: Solve for x
   x = 40,532,549.71/7,112.16
6. Step 6: Final answer
   x = 5,699.05