Finding the Fourth Proportional to 1,074.51, 1,611.50 and 526.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,074.51 : 1,611.50 = 526.59 : x
2. Step 2: Convert to fraction form
   1,074.51/1,611.50 = 526.59/x
3. Step 3: Cross multiply
   1,074.51x = 1,611.50 × 526.59
4. Step 4: Simplify right side
   1,074.51x = 848,597.15
5. Step 5: Solve for x
   x = 848,597.15/1,074.51
6. Step 6: Final answer
   x = 789.75