Finding the Fourth Proportional to 1,870.75, 2,807.34 and 716.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,870.75 : 2,807.34 = 716.50 : x
2. Step 2: Convert to fraction form
   1,870.75/2,807.34 = 716.50/x
3. Step 3: Cross multiply
   1,870.75x = 2,807.34 × 716.50
4. Step 4: Simplify right side
   1,870.75x = 2,011,459.11
5. Step 5: Solve for x
   x = 2,011,459.11/1,870.75
6. Step 6: Final answer
   x = 1,075.22