Finding the Fourth Proportional to 1,139.51, 1,706.50 and 651.08

Step by Step Solution

1. Step 1: Write the proportion equation
   1,139.51 : 1,706.50 = 651.08 : x
2. Step 2: Convert to fraction form
   1,139.51/1,706.50 = 651.08/x
3. Step 3: Cross multiply
   1,139.51x = 1,706.50 × 651.08
4. Step 4: Simplify right side
   1,139.51x = 1,111,063.50
5. Step 5: Solve for x
   x = 1,111,063.50/1,139.51
6. Step 6: Final answer
   x = 975.04