Finding the Fourth Proportional to 1,043.89, 1,438.89 and 707.68

Step by Step Solution

1. Step 1: Write the proportion equation
   1,043.89 : 1,438.89 = 707.68 : x
2. Step 2: Convert to fraction form
   1,043.89/1,438.89 = 707.68/x
3. Step 3: Cross multiply
   1,043.89x = 1,438.89 × 707.68
4. Step 4: Simplify right side
   1,043.89x = 1,018,272.82
5. Step 5: Solve for x
   x = 1,018,272.82/1,043.89
6. Step 6: Final answer
   x = 975.46