Finding the Fourth Proportional to 70,499.75, 105,608.63 and 42,404.30

Step by Step Solution

1. Step 1: Write the proportion equation
   70,499.75 : 105,608.63 = 42,404.30 : x
2. Step 2: Convert to fraction form
   70,499.75/105,608.63 = 42,404.30/x
3. Step 3: Cross multiply
   70,499.75x = 105,608.63 × 42,404.30
4. Step 4: Simplify right side
   70,499.75x = 4,478,259,289.04
5. Step 5: Solve for x
   x = 4,478,259,289.04/70,499.75
6. Step 6: Final answer
   x = 63,521.64