Finding the Fourth Proportional to 139,063.77, 208,603.72 and 53,675.10

Step by Step Solution

1. Step 1: Write the proportion equation
   139,063.77 : 208,603.72 = 53,675.10 : x
2. Step 2: Convert to fraction form
   139,063.77/208,603.72 = 53,675.10/x
3. Step 3: Cross multiply
   139,063.77x = 208,603.72 × 53,675.10
4. Step 4: Simplify right side
   139,063.77x = 11,196,824,816.20
5. Step 5: Solve for x
   x = 11,196,824,816.20/139,063.77
6. Step 6: Final answer
   x = 80,515.76