Finding the Fourth Proportional to 70,499.25, 105,607.88 and 42,403.79

Step by Step Solution

1. Step 1: Write the proportion equation
   70,499.25 : 105,607.88 = 42,403.79 : x
2. Step 2: Convert to fraction form
   70,499.25/105,607.88 = 42,403.79/x
3. Step 3: Cross multiply
   70,499.25x = 105,607.88 × 42,403.79
4. Step 4: Simplify right side
   70,499.25x = 4,478,174,365.87
5. Step 5: Solve for x
   x = 4,478,174,365.87/70,499.25
6. Step 6: Final answer
   x = 63,520.88