Finding the Fourth Proportional to 76,314.24, 105,309.99 and 42,320.06

Step by Step Solution

1. Step 1: Write the proportion equation
   76,314.24 : 105,309.99 = 42,320.06 : x
2. Step 2: Convert to fraction form
   76,314.24/105,309.99 = 42,320.06/x
3. Step 3: Cross multiply
   76,314.24x = 105,309.99 × 42,320.06
4. Step 4: Simplify right side
   76,314.24x = 4,456,725,095.40
5. Step 5: Solve for x
   x = 4,456,725,095.40/76,314.24
6. Step 6: Final answer
   x = 58,399.65