Finding the Fourth Proportional to 78,010.57, 107,654.50 and 42,200.49

Step by Step Solution

1. Step 1: Write the proportion equation
   78,010.57 : 107,654.50 = 42,200.49 : x
2. Step 2: Convert to fraction form
   78,010.57/107,654.50 = 42,200.49/x
3. Step 3: Cross multiply
   78,010.57x = 107,654.50 × 42,200.49
4. Step 4: Simplify right side
   78,010.57x = 4,543,072,650.71
5. Step 5: Solve for x
   x = 4,543,072,650.71/78,010.57
6. Step 6: Final answer
   x = 58,236.63