Finding the Fourth Proportional to 76,303.47, 105,309.59 and 42,319.47

Step by Step Solution

1. Step 1: Write the proportion equation
   76,303.47 : 105,309.59 = 42,319.47 : x
2. Step 2: Convert to fraction form
   76,303.47/105,309.59 = 42,319.47/x
3. Step 3: Cross multiply
   76,303.47x = 105,309.59 × 42,319.47
4. Step 4: Simplify right side
   76,303.47x = 4,456,645,823.12
5. Step 5: Solve for x
   x = 4,456,645,823.12/76,303.47
6. Step 6: Final answer
   x = 58,406.86