Finding the Fourth Proportional to 2,547.68, 3,820.31 and 988.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,547.68 : 3,820.31 = 988.42 : x
2. Step 2: Convert to fraction form
   2,547.68/3,820.31 = 988.42/x
3. Step 3: Cross multiply
   2,547.68x = 3,820.31 × 988.42
4. Step 4: Simplify right side
   2,547.68x = 3,776,063.73
5. Step 5: Solve for x
   x = 3,776,063.73/2,547.68
6. Step 6: Final answer
   x = 1,482.16