Finding the Fourth Proportional to 139,715.02, 209,574.50 and 39,875.23

Step by Step Solution

1. Step 1: Write the proportion equation
   139,715.02 : 209,574.50 = 39,875.23 : x
2. Step 2: Convert to fraction form
   139,715.02/209,574.50 = 39,875.23/x
3. Step 3: Cross multiply
   139,715.02x = 209,574.50 × 39,875.23
4. Step 4: Simplify right side
   139,715.02x = 8,356,831,389.64
5. Step 5: Solve for x
   x = 8,356,831,389.64/139,715.02
6. Step 6: Final answer
   x = 59,813.41