Finding the Fourth Proportional to 83,100.79, 124,509.39 and 45,692.20

Step by Step Solution

1. Step 1: Write the proportion equation
   83,100.79 : 124,509.39 = 45,692.20 : x
2. Step 2: Convert to fraction form
   83,100.79/124,509.39 = 45,692.20/x
3. Step 3: Cross multiply
   83,100.79x = 124,509.39 × 45,692.20
4. Step 4: Simplify right side
   83,100.79x = 5,689,107,949.76
5. Step 5: Solve for x
   x = 5,689,107,949.76/83,100.79
6. Step 6: Final answer
   x = 68,460.34