Finding the Fourth Proportional to 1,445.86, 1,996.20 and 1,113.70

Step by Step Solution

1. Step 1: Write the proportion equation
   1,445.86 : 1,996.20 = 1,113.70 : x
2. Step 2: Convert to fraction form
   1,445.86/1,996.20 = 1,113.70/x
3. Step 3: Cross multiply
   1,445.86x = 1,996.20 × 1,113.70
4. Step 4: Simplify right side
   1,445.86x = 2,223,167.94
5. Step 5: Solve for x
   x = 2,223,167.94/1,445.86
6. Step 6: Final answer
   x = 1,537.61