Finding the Fourth Proportional to 245,625, 338,962.50 and 139,641

Step by Step Solution

1. Step 1: Write the proportion equation
   245,625 : 338,962.50 = 139,641 : x
2. Step 2: Convert to fraction form
   245,625/338,962.50 = 139,641/x
3. Step 3: Cross multiply
   245,625x = 338,962.50 × 139,641
4. Step 4: Simplify right side
   245,625x = 47,333,062,462.50
5. Step 5: Solve for x
   x = 47,333,062,462.50/245,625
6. Step 6: Final answer
   x = 192,704.58