Finding the Fourth Proportional to 7,111.17, 9,810.72 and 4,125.92

Step by Step Solution

1. Step 1: Write the proportion equation
   7,111.17 : 9,810.72 = 4,125.92 : x
2. Step 2: Convert to fraction form
   7,111.17/9,810.72 = 4,125.92/x
3. Step 3: Cross multiply
   7,111.17x = 9,810.72 × 4,125.92
4. Step 4: Simplify right side
   7,111.17x = 40,478,196.81
5. Step 5: Solve for x
   x = 40,478,196.81/7,111.17
6. Step 6: Final answer
   x = 5,692.20