Finding the Fourth Proportional to 78,010.65, 107,654.37 and 42,200.57

Step by Step Solution

1. Step 1: Write the proportion equation
   78,010.65 : 107,654.37 = 42,200.57 : x
2. Step 2: Convert to fraction form
   78,010.65/107,654.37 = 42,200.57/x
3. Step 3: Cross multiply
   78,010.65x = 107,654.37 × 42,200.57
4. Step 4: Simplify right side
   78,010.65x = 4,543,075,238.72
5. Step 5: Solve for x
   x = 4,543,075,238.72/78,010.65
6. Step 6: Final answer
   x = 58,236.60