Finding the Fourth Proportional to 342,420.84, 472,554.72 and 189,456.57

Step by Step Solution

1. Step 1: Write the proportion equation
   342,420.84 : 472,554.72 = 189,456.57 : x
2. Step 2: Convert to fraction form
   342,420.84/472,554.72 = 189,456.57/x
3. Step 3: Cross multiply
   342,420.84x = 472,554.72 × 189,456.57
4. Step 4: Simplify right side
   342,420.84x = 89,528,596,388.51
5. Step 5: Solve for x
   x = 89,528,596,388.51/342,420.84
6. Step 6: Final answer
   x = 261,457.79