Finding the Fourth Proportional to 139,435.50, 209,111.32 and 39,603.81

Step by Step Solution

1. Step 1: Write the proportion equation
   139,435.50 : 209,111.32 = 39,603.81 : x
2. Step 2: Convert to fraction form
   139,435.50/209,111.32 = 39,603.81/x
3. Step 3: Cross multiply
   139,435.50x = 209,111.32 × 39,603.81
4. Step 4: Simplify right side
   139,435.50x = 8,281,604,986.13
5. Step 5: Solve for x
   x = 8,281,604,986.13/139,435.50
6. Step 6: Final answer
   x = 59,393.81