Finding the Fourth Proportional to 76,238.19, 105,205.68 and 42,248.12

Step by Step Solution

1. Step 1: Write the proportion equation
   76,238.19 : 105,205.68 = 42,248.12 : x
2. Step 2: Convert to fraction form
   76,238.19/105,205.68 = 42,248.12/x
3. Step 3: Cross multiply
   76,238.19x = 105,205.68 × 42,248.12
4. Step 4: Simplify right side
   76,238.19x = 4,444,741,667.29
5. Step 5: Solve for x
   x = 4,444,741,667.29/76,238.19
6. Step 6: Final answer
   x = 58,300.72