Finding the Fourth Proportional to 1,300.10, 1,950.59 and 812.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,300.10 : 1,950.59 = 812.57 : x
2. Step 2: Convert to fraction form
   1,300.10/1,950.59 = 812.57/x
3. Step 3: Cross multiply
   1,300.10x = 1,950.59 × 812.57
4. Step 4: Simplify right side
   1,300.10x = 1,584,983.19
5. Step 5: Solve for x
   x = 1,584,983.19/1,300.10
6. Step 6: Final answer
   x = 1,219.13