Finding the Fourth Proportional to 1,188,719.25, 1,783,072.72 and 290,165.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,188,719.25 : 1,783,072.72 = 290,165.69 : x
2. Step 2: Convert to fraction form
   1,188,719.25/1,783,072.72 = 290,165.69/x
3. Step 3: Cross multiply
   1,188,719.25x = 1,783,072.72 × 290,165.69
4. Step 4: Simplify right side
   1,188,719.25x = 517,386,530,123.28
5. Step 5: Solve for x
   x = 517,386,530,123.28/1,188,719.25
6. Step 6: Final answer
   x = 435,247.04