Finding the Fourth Proportional to 78,218.04, 107,940.54 and 42,407.94

Step by Step Solution

1. Step 1: Write the proportion equation
   78,218.04 : 107,940.54 = 42,407.94 : x
2. Step 2: Convert to fraction form
   78,218.04/107,940.54 = 42,407.94/x
3. Step 3: Cross multiply
   78,218.04x = 107,940.54 × 42,407.94
4. Step 4: Simplify right side
   78,218.04x = 4,577,535,943.89
5. Step 5: Solve for x
   x = 4,577,535,943.89/78,218.04
6. Step 6: Final answer
   x = 58,522.76