Finding the Fourth Proportional to 139,871.99, 209,807.78 and 64,951.18

Step by Step Solution

1. Step 1: Write the proportion equation
   139,871.99 : 209,807.78 = 64,951.18 : x
2. Step 2: Convert to fraction form
   139,871.99/209,807.78 = 64,951.18/x
3. Step 3: Cross multiply
   139,871.99x = 209,807.78 × 64,951.18
4. Step 4: Simplify right side
   139,871.99x = 13,627,262,034.91
5. Step 5: Solve for x
   x = 13,627,262,034.91/139,871.99
6. Step 6: Final answer
   x = 97,426.67