Finding the Fourth Proportional to 281,701.83, 388,748.86 and 152,640.21

Step by Step Solution

1. Step 1: Write the proportion equation
   281,701.83 : 388,748.86 = 152,640.21 : x
2. Step 2: Convert to fraction form
   281,701.83/388,748.86 = 152,640.21/x
3. Step 3: Cross multiply
   281,701.83x = 388,748.86 × 152,640.21
4. Step 4: Simplify right side
   281,701.83x = 59,338,704,920.72
5. Step 5: Solve for x
   x = 59,338,704,920.72/281,701.83
6. Step 6: Final answer
   x = 210,643.67