Finding the Fourth Proportional to 1,487.88, 2,230.56 and 707.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,487.88 : 2,230.56 = 707.49 : x
2. Step 2: Convert to fraction form
   1,487.88/2,230.56 = 707.49/x
3. Step 3: Cross multiply
   1,487.88x = 2,230.56 × 707.49
4. Step 4: Simplify right side
   1,487.88x = 1,578,098.89
5. Step 5: Solve for x
   x = 1,578,098.89/1,487.88
6. Step 6: Final answer
   x = 1,060.64