Finding the Fourth Proportional to 9,901.80, 13,663.98 and 5,424.75

Step by Step Solution

1. Step 1: Write the proportion equation
   9,901.80 : 13,663.98 = 5,424.75 : x
2. Step 2: Convert to fraction form
   9,901.80/13,663.98 = 5,424.75/x
3. Step 3: Cross multiply
   9,901.80x = 13,663.98 × 5,424.75
4. Step 4: Simplify right side
   9,901.80x = 74,123,675.51
5. Step 5: Solve for x
   x = 74,123,675.51/9,901.80
6. Step 6: Final answer
   x = 7,485.88