Finding the Fourth Proportional to 76,389.11, 105,417.01 and 42,397.61

Step by Step Solution

1. Step 1: Write the proportion equation
   76,389.11 : 105,417.01 = 42,397.61 : x
2. Step 2: Convert to fraction form
   76,389.11/105,417.01 = 42,397.61/x
3. Step 3: Cross multiply
   76,389.11x = 105,417.01 × 42,397.61
4. Step 4: Simplify right side
   76,389.11x = 4,469,429,277.35
5. Step 5: Solve for x
   x = 4,469,429,277.35/76,389.11
6. Step 6: Final answer
   x = 58,508.72