Finding the Fourth Proportional to 76,443.48, 105,480.58 and 42,903

Step by Step Solution

1. Step 1: Write the proportion equation
   76,443.48 : 105,480.58 = 42,903 : x
2. Step 2: Convert to fraction form
   76,443.48/105,480.58 = 42,903/x
3. Step 3: Cross multiply
   76,443.48x = 105,480.58 × 42,903
4. Step 4: Simplify right side
   76,443.48x = 4,525,433,323.74
5. Step 5: Solve for x
   x = 4,525,433,323.74/76,443.48
6. Step 6: Final answer
   x = 59,199.73