Finding the Fourth Proportional to 70,178.79, 105,294.42 and 42,118.95

Step by Step Solution

1. Step 1: Write the proportion equation
   70,178.79 : 105,294.42 = 42,118.95 : x
2. Step 2: Convert to fraction form
   70,178.79/105,294.42 = 42,118.95/x
3. Step 3: Cross multiply
   70,178.79x = 105,294.42 × 42,118.95
4. Step 4: Simplify right side
   70,178.79x = 4,434,890,411.26
5. Step 5: Solve for x
   x = 4,434,890,411.26/70,178.79
6. Step 6: Final answer
   x = 63,194.17