Finding the Fourth Proportional to 76,390.56, 105,417.38 and 42,397.07

Step by Step Solution

1. Step 1: Write the proportion equation
   76,390.56 : 105,417.38 = 42,397.07 : x
2. Step 2: Convert to fraction form
   76,390.56/105,417.38 = 42,397.07/x
3. Step 3: Cross multiply
   76,390.56x = 105,417.38 × 42,397.07
4. Step 4: Simplify right side
   76,390.56x = 4,469,387,300.00
5. Step 5: Solve for x
   x = 4,469,387,300.00/76,390.56
6. Step 6: Final answer
   x = 58,507.06