Finding the Fourth Proportional to 1,245.63, 1,870.17 and 752.79

Step by Step Solution

1. Step 1: Write the proportion equation
   1,245.63 : 1,870.17 = 752.79 : x
2. Step 2: Convert to fraction form
   1,245.63/1,870.17 = 752.79/x
3. Step 3: Cross multiply
   1,245.63x = 1,870.17 × 752.79
4. Step 4: Simplify right side
   1,245.63x = 1,407,845.27
5. Step 5: Solve for x
   x = 1,407,845.27/1,245.63
6. Step 6: Final answer
   x = 1,130.23