Finding the Fourth Proportional to 139,878.57, 210,000.77 and 83,056.23

Step by Step Solution

1. Step 1: Write the proportion equation
   139,878.57 : 210,000.77 = 83,056.23 : x
2. Step 2: Convert to fraction form
   139,878.57/210,000.77 = 83,056.23/x
3. Step 3: Cross multiply
   139,878.57x = 210,000.77 × 83,056.23
4. Step 4: Simplify right side
   139,878.57x = 17,441,872,253.30
5. Step 5: Solve for x
   x = 17,441,872,253.30/139,878.57
6. Step 6: Final answer
   x = 124,692.96