Finding the Fourth Proportional to 74,589.72, 102,910.58 and 42,319

Step by Step Solution

1. Step 1: Write the proportion equation
   74,589.72 : 102,910.58 = 42,319 : x
2. Step 2: Convert to fraction form
   74,589.72/102,910.58 = 42,319/x
3. Step 3: Cross multiply
   74,589.72x = 102,910.58 × 42,319
4. Step 4: Simplify right side
   74,589.72x = 4,355,072,835.02
5. Step 5: Solve for x
   x = 4,355,072,835.02/74,589.72
6. Step 6: Final answer
   x = 58,387.04