Finding the Fourth Proportional to 1,012.77, 1,517.89 and 543.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,012.77 : 1,517.89 = 543.09 : x
2. Step 2: Convert to fraction form
   1,012.77/1,517.89 = 543.09/x
3. Step 3: Cross multiply
   1,012.77x = 1,517.89 × 543.09
4. Step 4: Simplify right side
   1,012.77x = 824,343.29
5. Step 5: Solve for x
   x = 824,343.29/1,012.77
6. Step 6: Final answer
   x = 813.95