Finding the Fourth Proportional to 1,870.72, 2,807.36 and 716.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,870.72 : 2,807.36 = 716.48 : x
2. Step 2: Convert to fraction form
   1,870.72/2,807.36 = 716.48/x
3. Step 3: Cross multiply
   1,870.72x = 2,807.36 × 716.48
4. Step 4: Simplify right side
   1,870.72x = 2,011,417.29
5. Step 5: Solve for x
   x = 2,011,417.29/1,870.72
6. Step 6: Final answer
   x = 1,075.21