Finding the Fourth Proportional to 390,453.46, 585,825.98 and 153,961

Step by Step Solution

1. Step 1: Write the proportion equation
   390,453.46 : 585,825.98 = 153,961 : x
2. Step 2: Convert to fraction form
   390,453.46/585,825.98 = 153,961/x
3. Step 3: Cross multiply
   390,453.46x = 585,825.98 × 153,961
4. Step 4: Simplify right side
   390,453.46x = 90,194,353,706.78
5. Step 5: Solve for x
   x = 90,194,353,706.78/390,453.46
6. Step 6: Final answer
   x = 230,998.99