Finding the Fourth Proportional to 174,870.30, 262,435.05 and 128,214.30

Step by Step Solution

1. Step 1: Write the proportion equation
   174,870.30 : 262,435.05 = 128,214.30 : x
2. Step 2: Convert to fraction form
   174,870.30/262,435.05 = 128,214.30/x
3. Step 3: Cross multiply
   174,870.30x = 262,435.05 × 128,214.30
4. Step 4: Simplify right side
   174,870.30x = 33,647,926,231.22
5. Step 5: Solve for x
   x = 33,647,926,231.22/174,870.30
6. Step 6: Final answer
   x = 192,416.47