Finding the Fourth Proportional to 70,938.24, 106,219.61 and 42,820.71

Step by Step Solution

1. Step 1: Write the proportion equation
   70,938.24 : 106,219.61 = 42,820.71 : x
2. Step 2: Convert to fraction form
   70,938.24/106,219.61 = 42,820.71/x
3. Step 3: Cross multiply
   70,938.24x = 106,219.61 × 42,820.71
4. Step 4: Simplify right side
   70,938.24x = 4,548,399,116.12
5. Step 5: Solve for x
   x = 4,548,399,116.12/70,938.24
6. Step 6: Final answer
   x = 64,117.73