Finding the Fourth Proportional to 1,095.51, 1,511.55 and 623.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,095.51 : 1,511.55 = 623.30 : x
2. Step 2: Convert to fraction form
   1,095.51/1,511.55 = 623.30/x
3. Step 3: Cross multiply
   1,095.51x = 1,511.55 × 623.30
4. Step 4: Simplify right side
   1,095.51x = 942,150.06
5. Step 5: Solve for x
   x = 942,150.06/1,095.51
6. Step 6: Final answer
   x = 860.01