Finding the Fourth Proportional to 1,038.24, 1,431.83 and 707.11

Step by Step Solution

1. Step 1: Write the proportion equation
   1,038.24 : 1,431.83 = 707.11 : x
2. Step 2: Convert to fraction form
   1,038.24/1,431.83 = 707.11/x
3. Step 3: Cross multiply
   1,038.24x = 1,431.83 × 707.11
4. Step 4: Simplify right side
   1,038.24x = 1,012,459.50
5. Step 5: Solve for x
   x = 1,012,459.50/1,038.24
6. Step 6: Final answer
   x = 975.17