Finding the Fourth Proportional to 76,138.11, 105,069.98 and 42,146.66

Step by Step Solution

1. Step 1: Write the proportion equation
   76,138.11 : 105,069.98 = 42,146.66 : x
2. Step 2: Convert to fraction form
   76,138.11/105,069.98 = 42,146.66/x
3. Step 3: Cross multiply
   76,138.11x = 105,069.98 × 42,146.66
4. Step 4: Simplify right side
   76,138.11x = 4,428,349,091.31
5. Step 5: Solve for x
   x = 4,428,349,091.31/76,138.11
6. Step 6: Final answer
   x = 58,162.06