Finding the Fourth Proportional to 89,407, 133,906.38 and 42,692.68

Step by Step Solution

1. Step 1: Write the proportion equation
   89,407 : 133,906.38 = 42,692.68 : x
2. Step 2: Convert to fraction form
   89,407/133,906.38 = 42,692.68/x
3. Step 3: Cross multiply
   89,407x = 133,906.38 × 42,692.68
4. Step 4: Simplify right side
   89,407x = 5,716,822,231.30
5. Step 5: Solve for x
   x = 5,716,822,231.30/89,407
6. Step 6: Final answer
   x = 63,941.55