Finding the Fourth Proportional to 345,665, 477,017.88 and 186,689

Step by Step Solution

1. Step 1: Write the proportion equation
   345,665 : 477,017.88 = 186,689 : x
2. Step 2: Convert to fraction form
   345,665/477,017.88 = 186,689/x
3. Step 3: Cross multiply
   345,665x = 477,017.88 × 186,689
4. Step 4: Simplify right side
   345,665x = 89,053,990,999.32
5. Step 5: Solve for x
   x = 89,053,990,999.32/345,665
6. Step 6: Final answer
   x = 257,630.92