Finding the Fourth Proportional to 1,155.67, 1,731.56 and 1,113.01

Step by Step Solution

1. Step 1: Write the proportion equation
   1,155.67 : 1,731.56 = 1,113.01 : x
2. Step 2: Convert to fraction form
   1,155.67/1,731.56 = 1,113.01/x
3. Step 3: Cross multiply
   1,155.67x = 1,731.56 × 1,113.01
4. Step 4: Simplify right side
   1,155.67x = 1,927,243.60
5. Step 5: Solve for x
   x = 1,927,243.60/1,155.67
6. Step 6: Final answer
   x = 1,667.64