Finding the Fourth Proportional to 139,025.34, 208,506.03 and 82,881.30

Step by Step Solution

1. Step 1: Write the proportion equation
   139,025.34 : 208,506.03 = 82,881.30 : x
2. Step 2: Convert to fraction form
   139,025.34/208,506.03 = 82,881.30/x
3. Step 3: Cross multiply
   139,025.34x = 208,506.03 × 82,881.30
4. Step 4: Simplify right side
   139,025.34x = 17,281,250,824.24
5. Step 5: Solve for x
   x = 17,281,250,824.24/139,025.34
6. Step 6: Final answer
   x = 124,302.88