Finding the Fourth Proportional to 9,970.08, 13,757.61 and 5,720.01

Step by Step Solution

1. Step 1: Write the proportion equation
   9,970.08 : 13,757.61 = 5,720.01 : x
2. Step 2: Convert to fraction form
   9,970.08/13,757.61 = 5,720.01/x
3. Step 3: Cross multiply
   9,970.08x = 13,757.61 × 5,720.01
4. Step 4: Simplify right side
   9,970.08x = 78,693,666.78
5. Step 5: Solve for x
   x = 78,693,666.78/9,970.08
6. Step 6: Final answer
   x = 7,892.98