Finding the Fourth Proportional to 9,897.93, 13,659.15 and 5,421.76

Step by Step Solution

1. Step 1: Write the proportion equation
   9,897.93 : 13,659.15 = 5,421.76 : x
2. Step 2: Convert to fraction form
   9,897.93/13,659.15 = 5,421.76/x
3. Step 3: Cross multiply
   9,897.93x = 13,659.15 × 5,421.76
4. Step 4: Simplify right side
   9,897.93x = 74,056,598.96
5. Step 5: Solve for x
   x = 74,056,598.96/9,897.93
6. Step 6: Final answer
   x = 7,482.03