Finding the Fourth Proportional to 139,089.25, 208,668.84 and 64,262.35

Step by Step Solution

1. Step 1: Write the proportion equation
   139,089.25 : 208,668.84 = 64,262.35 : x
2. Step 2: Convert to fraction form
   139,089.25/208,668.84 = 64,262.35/x
3. Step 3: Cross multiply
   139,089.25x = 208,668.84 × 64,262.35
4. Step 4: Simplify right side
   139,089.25x = 13,409,550,030.17
5. Step 5: Solve for x
   x = 13,409,550,030.17/139,089.25
6. Step 6: Final answer
   x = 96,409.68