Finding the Fourth Proportional to 393,759.55, 590,647.69 and 141,056.47

Step by Step Solution

1. Step 1: Write the proportion equation
   393,759.55 : 590,647.69 = 141,056.47 : x
2. Step 2: Convert to fraction form
   393,759.55/590,647.69 = 141,056.47/x
3. Step 3: Cross multiply
   393,759.55x = 590,647.69 × 141,056.47
4. Step 4: Simplify right side
   393,759.55x = 83,314,675,211.82
5. Step 5: Solve for x
   x = 83,314,675,211.82/393,759.55
6. Step 6: Final answer
   x = 211,587.70