Finding the Fourth Proportional to 139,908.20, 209,686.59 and 59,852.12

Step by Step Solution

1. Step 1: Write the proportion equation
   139,908.20 : 209,686.59 = 59,852.12 : x
2. Step 2: Convert to fraction form
   139,908.20/209,686.59 = 59,852.12/x
3. Step 3: Cross multiply
   139,908.20x = 209,686.59 × 59,852.12
4. Step 4: Simplify right side
   139,908.20x = 12,550,185,898.64
5. Step 5: Solve for x
   x = 12,550,185,898.64/139,908.20
6. Step 6: Final answer
   x = 89,703.01