Finding the Fourth Proportional to 139,867.61, 209,984.35 and 83,045.25

Step by Step Solution

1. Step 1: Write the proportion equation
   139,867.61 : 209,984.35 = 83,045.25 : x
2. Step 2: Convert to fraction form
   139,867.61/209,984.35 = 83,045.25/x
3. Step 3: Cross multiply
   139,867.61x = 209,984.35 × 83,045.25
4. Step 4: Simplify right side
   139,867.61x = 17,438,201,376.69
5. Step 5: Solve for x
   x = 17,438,201,376.69/139,867.61
6. Step 6: Final answer
   x = 124,676.48