Finding the Fourth Proportional to 78,216.88, 107,940.01 and 42,406.98

Step by Step Solution

1. Step 1: Write the proportion equation
   78,216.88 : 107,940.01 = 42,406.98 : x
2. Step 2: Convert to fraction form
   78,216.88/107,940.01 = 42,406.98/x
3. Step 3: Cross multiply
   78,216.88x = 107,940.01 × 42,406.98
4. Step 4: Simplify right side
   78,216.88x = 4,577,409,845.27
5. Step 5: Solve for x
   x = 4,577,409,845.27/78,216.88
6. Step 6: Final answer
   x = 58,522.02