Finding the Fourth Proportional to 77,621.50, 107,117.67 and 42,293.50

Step by Step Solution

1. Step 1: Write the proportion equation
   77,621.50 : 107,117.67 = 42,293.50 : x
2. Step 2: Convert to fraction form
   77,621.50/107,117.67 = 42,293.50/x
3. Step 3: Cross multiply
   77,621.50x = 107,117.67 × 42,293.50
4. Step 4: Simplify right side
   77,621.50x = 4,530,381,176.15
5. Step 5: Solve for x
   x = 4,530,381,176.15/77,621.50
6. Step 6: Final answer
   x = 58,365.03