Finding the Fourth Proportional to 1,401.36, 2,094.72 and 987.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,401.36 : 2,094.72 = 987.72 : x
2. Step 2: Convert to fraction form
   1,401.36/2,094.72 = 987.72/x
3. Step 3: Cross multiply
   1,401.36x = 2,094.72 × 987.72
4. Step 4: Simplify right side
   1,401.36x = 2,068,996.84
5. Step 5: Solve for x
   x = 2,068,996.84/1,401.36
6. Step 6: Final answer
   x = 1,476.42