Finding the Fourth Proportional to 139,797.84, 209,703.69 and 39,972.72

Step by Step Solution

1. Step 1: Write the proportion equation
   139,797.84 : 209,703.69 = 39,972.72 : x
2. Step 2: Convert to fraction form
   139,797.84/209,703.69 = 39,972.72/x
3. Step 3: Cross multiply
   139,797.84x = 209,703.69 × 39,972.72
4. Step 4: Simplify right side
   139,797.84x = 8,382,426,883.34
5. Step 5: Solve for x
   x = 8,382,426,883.34/139,797.84
6. Step 6: Final answer
   x = 59,961.06