Finding the Fourth Proportional to 89,404.20, 133,887.60 and 42,602.40

Step by Step Solution

1. Step 1: Write the proportion equation
   89,404.20 : 133,887.60 = 42,602.40 : x
2. Step 2: Convert to fraction form
   89,404.20/133,887.60 = 42,602.40/x
3. Step 3: Cross multiply
   89,404.20x = 133,887.60 × 42,602.40
4. Step 4: Simplify right side
   89,404.20x = 5,703,933,090.24
5. Step 5: Solve for x
   x = 5,703,933,090.24/89,404.20
6. Step 6: Final answer
   x = 63,799.39