Finding the Fourth Proportional to 78,931.89, 108,924.29 and 43,122.09

Step by Step Solution

1. Step 1: Write the proportion equation
   78,931.89 : 108,924.29 = 43,122.09 : x
2. Step 2: Convert to fraction form
   78,931.89/108,924.29 = 43,122.09/x
3. Step 3: Cross multiply
   78,931.89x = 108,924.29 × 43,122.09
4. Step 4: Simplify right side
   78,931.89x = 4,697,042,820.96
5. Step 5: Solve for x
   x = 4,697,042,820.96/78,931.89
6. Step 6: Final answer
   x = 59,507.54