Finding the Fourth Proportional to 76,155.39, 105,094.42 and 42,621.39

Step by Step Solution

1. Step 1: Write the proportion equation
   76,155.39 : 105,094.42 = 42,621.39 : x
2. Step 2: Convert to fraction form
   76,155.39/105,094.42 = 42,621.39/x
3. Step 3: Cross multiply
   76,155.39x = 105,094.42 × 42,621.39
4. Step 4: Simplify right side
   76,155.39x = 4,479,270,261.64
5. Step 5: Solve for x
   x = 4,479,270,261.64/76,155.39
6. Step 6: Final answer
   x = 58,817.51