Finding the Fourth Proportional to 76,298.31, 105,292.94 and 42,308.23

Step by Step Solution

1. Step 1: Write the proportion equation
   76,298.31 : 105,292.94 = 42,308.23 : x
2. Step 2: Convert to fraction form
   76,298.31/105,292.94 = 42,308.23/x
3. Step 3: Cross multiply
   76,298.31x = 105,292.94 × 42,308.23
4. Step 4: Simplify right side
   76,298.31x = 4,454,758,060.68
5. Step 5: Solve for x
   x = 4,454,758,060.68/76,298.31
6. Step 6: Final answer
   x = 58,386.06