Finding the Fourth Proportional to 1,430.83, 1,972.81 and 1,111.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,430.83 : 1,972.81 = 1,111.89 : x
2. Step 2: Convert to fraction form
   1,430.83/1,972.81 = 1,111.89/x
3. Step 3: Cross multiply
   1,430.83x = 1,972.81 × 1,111.89
4. Step 4: Simplify right side
   1,430.83x = 2,193,556.50
5. Step 5: Solve for x
   x = 2,193,556.50/1,430.83
6. Step 6: Final answer
   x = 1,533.06