Finding the Fourth Proportional to 76,443.96, 105,493.70 and 42,454.64

Step by Step Solution

1. Step 1: Write the proportion equation
   76,443.96 : 105,493.70 = 42,454.64 : x
2. Step 2: Convert to fraction form
   76,443.96/105,493.70 = 42,454.64/x
3. Step 3: Cross multiply
   76,443.96x = 105,493.70 × 42,454.64
4. Step 4: Simplify right side
   76,443.96x = 4,478,697,055.77
5. Step 5: Solve for x
   x = 4,478,697,055.77/76,443.96
6. Step 6: Final answer
   x = 58,587.98