Finding the Fourth Proportional to 311,399.07, 429,836.83 and 193,618.18

Step by Step Solution

1. Step 1: Write the proportion equation
   311,399.07 : 429,836.83 = 193,618.18 : x
2. Step 2: Convert to fraction form
   311,399.07/429,836.83 = 193,618.18/x
3. Step 3: Cross multiply
   311,399.07x = 429,836.83 × 193,618.18
4. Step 4: Simplify right side
   311,399.07x = 83,224,224,774.82
5. Step 5: Solve for x
   x = 83,224,224,774.82/311,399.07
6. Step 6: Final answer
   x = 267,259.07