Finding the Fourth Proportional to 1,402.45, 1,933.36 and 981.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,402.45 : 1,933.36 = 981.50 : x
2. Step 2: Convert to fraction form
   1,402.45/1,933.36 = 981.50/x
3. Step 3: Cross multiply
   1,402.45x = 1,933.36 × 981.50
4. Step 4: Simplify right side
   1,402.45x = 1,897,580.72
5. Step 5: Solve for x
   x = 1,897,580.72/1,402.45
6. Step 6: Final answer
   x = 1,353.05