Finding the Fourth Proportional to 139,406.06, 209,108.16 and 39,566.31

Step by Step Solution

1. Step 1: Write the proportion equation
   139,406.06 : 209,108.16 = 39,566.31 : x
2. Step 2: Convert to fraction form
   139,406.06/209,108.16 = 39,566.31/x
3. Step 3: Cross multiply
   139,406.06x = 209,108.16 × 39,566.31
4. Step 4: Simplify right side
   139,406.06x = 8,273,638,282.09
5. Step 5: Solve for x
   x = 8,273,638,282.09/139,406.06
6. Step 6: Final answer
   x = 59,349.20