Finding the Fourth Proportional to 78,650.63, 108,538.02 and 42,840.53

Step by Step Solution

1. Step 1: Write the proportion equation
   78,650.63 : 108,538.02 = 42,840.53 : x
2. Step 2: Convert to fraction form
   78,650.63/108,538.02 = 42,840.53/x
3. Step 3: Cross multiply
   78,650.63x = 108,538.02 × 42,840.53
4. Step 4: Simplify right side
   78,650.63x = 4,649,826,301.95
5. Step 5: Solve for x
   x = 4,649,826,301.95/78,650.63
6. Step 6: Final answer
   x = 59,120.01