Finding the Fourth Proportional to 78,300.48, 108,052.80 and 42,488.96

Step by Step Solution

1. Step 1: Write the proportion equation
   78,300.48 : 108,052.80 = 42,488.96 : x
2. Step 2: Convert to fraction form
   78,300.48/108,052.80 = 42,488.96/x
3. Step 3: Cross multiply
   78,300.48x = 108,052.80 × 42,488.96
4. Step 4: Simplify right side
   78,300.48x = 4,591,051,097.09
5. Step 5: Solve for x
   x = 4,591,051,097.09/78,300.48
6. Step 6: Final answer
   x = 58,633.75