Finding the Fourth Proportional to 139,434.84, 208,980.90 and 64,453.50

Step by Step Solution

1. Step 1: Write the proportion equation
   139,434.84 : 208,980.90 = 64,453.50 : x
2. Step 2: Convert to fraction form
   139,434.84/208,980.90 = 64,453.50/x
3. Step 3: Cross multiply
   139,434.84x = 208,980.90 × 64,453.50
4. Step 4: Simplify right side
   139,434.84x = 13,469,550,438.15
5. Step 5: Solve for x
   x = 13,469,550,438.15/139,434.84
6. Step 6: Final answer
   x = 96,601.04