Finding the Fourth Proportional to 76,470.77, 105,546.54 and 42,490.94

Step by Step Solution

1. Step 1: Write the proportion equation
   76,470.77 : 105,546.54 = 42,490.94 : x
2. Step 2: Convert to fraction form
   76,470.77/105,546.54 = 42,490.94/x
3. Step 3: Cross multiply
   76,470.77x = 105,546.54 × 42,490.94
4. Step 4: Simplify right side
   76,470.77x = 4,484,771,090.94
5. Step 5: Solve for x
   x = 4,484,771,090.94/76,470.77
6. Step 6: Final answer
   x = 58,646.87