Finding the Fourth Proportional to 139,687.88, 209,553.68 and 46,215.50

Step by Step Solution

1. Step 1: Write the proportion equation
   139,687.88 : 209,553.68 = 46,215.50 : x
2. Step 2: Convert to fraction form
   139,687.88/209,553.68 = 46,215.50/x
3. Step 3: Cross multiply
   139,687.88x = 209,553.68 × 46,215.50
4. Step 4: Simplify right side
   139,687.88x = 9,684,627,165.81
5. Step 5: Solve for x
   x = 9,684,627,165.81/139,687.88
6. Step 6: Final answer
   x = 69,330.48