Finding the Fourth Proportional to 78,047.42, 107,705.40 and 42,237.42

Step by Step Solution

1. Step 1: Write the proportion equation
   78,047.42 : 107,705.40 = 42,237.42 : x
2. Step 2: Convert to fraction form
   78,047.42/107,705.40 = 42,237.42/x
3. Step 3: Cross multiply
   78,047.42x = 107,705.40 × 42,237.42
4. Step 4: Simplify right side
   78,047.42x = 4,549,197,653.78
5. Step 5: Solve for x
   x = 4,549,197,653.78/78,047.42
6. Step 6: Final answer
   x = 58,287.61