Finding the Fourth Proportional to 1,459.89, 2,190.51 and 911.93

Step by Step Solution

1. Step 1: Write the proportion equation
   1,459.89 : 2,190.51 = 911.93 : x
2. Step 2: Convert to fraction form
   1,459.89/2,190.51 = 911.93/x
3. Step 3: Cross multiply
   1,459.89x = 2,190.51 × 911.93
4. Step 4: Simplify right side
   1,459.89x = 1,997,580.83
5. Step 5: Solve for x
   x = 1,997,580.83/1,459.89
6. Step 6: Final answer
   x = 1,368.31