Finding the Fourth Proportional to 9,870.96, 13,618.62 and 5,892.78

Step by Step Solution

1. Step 1: Write the proportion equation
   9,870.96 : 13,618.62 = 5,892.78 : x
2. Step 2: Convert to fraction form
   9,870.96/13,618.62 = 5,892.78/x
3. Step 3: Cross multiply
   9,870.96x = 13,618.62 × 5,892.78
4. Step 4: Simplify right side
   9,870.96x = 80,251,531.56
5. Step 5: Solve for x
   x = 80,251,531.56/9,870.96
6. Step 6: Final answer
   x = 8,130.06