Finding the Fourth Proportional to 78,453.79, 108,266.96 and 42,643.89

Step by Step Solution

1. Step 1: Write the proportion equation
   78,453.79 : 108,266.96 = 42,643.89 : x
2. Step 2: Convert to fraction form
   78,453.79/108,266.96 = 42,643.89/x
3. Step 3: Cross multiply
   78,453.79x = 108,266.96 × 42,643.89
4. Step 4: Simplify right side
   78,453.79x = 4,616,924,332.87
5. Step 5: Solve for x
   x = 4,616,924,332.87/78,453.79
6. Step 6: Final answer
   x = 58,848.96