Finding the Fourth Proportional to 1,953.51, 2,928.89 and 720.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,953.51 : 2,928.89 = 720.76 : x
2. Step 2: Convert to fraction form
   1,953.51/2,928.89 = 720.76/x
3. Step 3: Cross multiply
   1,953.51x = 2,928.89 × 720.76
4. Step 4: Simplify right side
   1,953.51x = 2,111,026.76
5. Step 5: Solve for x
   x = 2,111,026.76/1,953.51
6. Step 6: Final answer
   x = 1,080.63