Finding the Fourth Proportional to 139,175.30, 208,757.28 and 64,270.82

Step by Step Solution

1. Step 1: Write the proportion equation
   139,175.30 : 208,757.28 = 64,270.82 : x
2. Step 2: Convert to fraction form
   139,175.30/208,757.28 = 64,270.82/x
3. Step 3: Cross multiply
   139,175.30x = 208,757.28 × 64,270.82
4. Step 4: Simplify right side
   139,175.30x = 13,417,001,566.57
5. Step 5: Solve for x
   x = 13,417,001,566.57/139,175.30
6. Step 6: Final answer
   x = 96,403.61