Finding the Fourth Proportional to 1,783.89, 2,461.59 and 987.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,783.89 : 2,461.59 = 987.12 : x
2. Step 2: Convert to fraction form
   1,783.89/2,461.59 = 987.12/x
3. Step 3: Cross multiply
   1,783.89x = 2,461.59 × 987.12
4. Step 4: Simplify right side
   1,783.89x = 2,429,884.72
5. Step 5: Solve for x
   x = 2,429,884.72/1,783.89
6. Step 6: Final answer
   x = 1,362.13