Finding the Fourth Proportional to 78,047.72, 107,705.46 and 42,237.74

Step by Step Solution

1. Step 1: Write the proportion equation
   78,047.72 : 107,705.46 = 42,237.74 : x
2. Step 2: Convert to fraction form
   78,047.72/107,705.46 = 42,237.74/x
3. Step 3: Cross multiply
   78,047.72x = 107,705.46 × 42,237.74
4. Step 4: Simplify right side
   78,047.72x = 4,549,235,216.06
5. Step 5: Solve for x
   x = 4,549,235,216.06/78,047.72
6. Step 6: Final answer
   x = 58,287.87