Finding the Fourth Proportional to 7,101.86, 9,801.76 and 5,420.08

Step by Step Solution

1. Step 1: Write the proportion equation
   7,101.86 : 9,801.76 = 5,420.08 : x
2. Step 2: Convert to fraction form
   7,101.86/9,801.76 = 5,420.08/x
3. Step 3: Cross multiply
   7,101.86x = 9,801.76 × 5,420.08
4. Step 4: Simplify right side
   7,101.86x = 53,126,323.34
5. Step 5: Solve for x
   x = 53,126,323.34/7,101.86
6. Step 6: Final answer
   x = 7,480.62