Finding the Fourth Proportional to 290,792.54, 436,258.52 and 140,857.59

Step by Step Solution

1. Step 1: Write the proportion equation
   290,792.54 : 436,258.52 = 140,857.59 : x
2. Step 2: Convert to fraction form
   290,792.54/436,258.52 = 140,857.59/x
3. Step 3: Cross multiply
   290,792.54x = 436,258.52 × 140,857.59
4. Step 4: Simplify right side
   290,792.54x = 61,450,323,039.88
5. Step 5: Solve for x
   x = 61,450,323,039.88/290,792.54
6. Step 6: Final answer
   x = 211,320.15