Finding the Fourth Proportional to 1,401.34, 2,099.70 and 988.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,401.34 : 2,099.70 = 988.48 : x
2. Step 2: Convert to fraction form
   1,401.34/2,099.70 = 988.48/x
3. Step 3: Cross multiply
   1,401.34x = 2,099.70 × 988.48
4. Step 4: Simplify right side
   1,401.34x = 2,075,511.46
5. Step 5: Solve for x
   x = 2,075,511.46/1,401.34
6. Step 6: Final answer
   x = 1,481.09