Finding the Fourth Proportional to 1,767.56, 2,649.72 and 612.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,767.56 : 2,649.72 = 612.50 : x
2. Step 2: Convert to fraction form
   1,767.56/2,649.72 = 612.50/x
3. Step 3: Cross multiply
   1,767.56x = 2,649.72 × 612.50
4. Step 4: Simplify right side
   1,767.56x = 1,622,953.50
5. Step 5: Solve for x
   x = 1,622,953.50/1,767.56
6. Step 6: Final answer
   x = 918.19