Finding the Fourth Proportional to 139,095.37, 208,637.28 and 64,190.62

Step by Step Solution

1. Step 1: Write the proportion equation
   139,095.37 : 208,637.28 = 64,190.62 : x
2. Step 2: Convert to fraction form
   139,095.37/208,637.28 = 64,190.62/x
3. Step 3: Cross multiply
   139,095.37x = 208,637.28 × 64,190.62
4. Step 4: Simplify right side
   139,095.37x = 13,392,556,358.31
5. Step 5: Solve for x
   x = 13,392,556,358.31/139,095.37
6. Step 6: Final answer
   x = 96,283.26