Finding the Fourth Proportional to 76,300.47, 105,300.87 and 42,319.62

Step by Step Solution

1. Step 1: Write the proportion equation
   76,300.47 : 105,300.87 = 42,319.62 : x
2. Step 2: Convert to fraction form
   76,300.47/105,300.87 = 42,319.62/x
3. Step 3: Cross multiply
   76,300.47x = 105,300.87 × 42,319.62
4. Step 4: Simplify right side
   76,300.47x = 4,456,292,065.97
5. Step 5: Solve for x
   x = 4,456,292,065.97/76,300.47
6. Step 6: Final answer
   x = 58,404.52