Finding the Fourth Proportional to 64,994.79, 89,641.85 and 42,340.92

Step by Step Solution

1. Step 1: Write the proportion equation
   64,994.79 : 89,641.85 = 42,340.92 : x
2. Step 2: Convert to fraction form
   64,994.79/89,641.85 = 42,340.92/x
3. Step 3: Cross multiply
   64,994.79x = 89,641.85 × 42,340.92
4. Step 4: Simplify right side
   64,994.79x = 3,795,518,399.50
5. Step 5: Solve for x
   x = 3,795,518,399.50/64,994.79
6. Step 6: Final answer
   x = 58,397.27