Finding the Fourth Proportional to 139,945.62, 209,869.83 and 46,429.50

Step by Step Solution

1. Step 1: Write the proportion equation
   139,945.62 : 209,869.83 = 46,429.50 : x
2. Step 2: Convert to fraction form
   139,945.62/209,869.83 = 46,429.50/x
3. Step 3: Cross multiply
   139,945.62x = 209,869.83 × 46,429.50
4. Step 4: Simplify right side
   139,945.62x = 9,744,151,271.99
5. Step 5: Solve for x
   x = 9,744,151,271.99/139,945.62
6. Step 6: Final answer
   x = 69,628.13