Finding the Fourth Proportional to 76,445.91, 105,495.62 and 42,454.49

Step by Step Solution

1. Step 1: Write the proportion equation
   76,445.91 : 105,495.62 = 42,454.49 : x
2. Step 2: Convert to fraction form
   76,445.91/105,495.62 = 42,454.49/x
3. Step 3: Cross multiply
   76,445.91x = 105,495.62 × 42,454.49
4. Step 4: Simplify right side
   76,445.91x = 4,478,762,004.58
5. Step 5: Solve for x
   x = 4,478,762,004.58/76,445.91
6. Step 6: Final answer
   x = 58,587.33