Finding the Fourth Proportional to 78,690.99, 108,593.55 and 42,881.01

Step by Step Solution

1. Step 1: Write the proportion equation
   78,690.99 : 108,593.55 = 42,881.01 : x
2. Step 2: Convert to fraction form
   78,690.99/108,593.55 = 42,881.01/x
3. Step 3: Cross multiply
   78,690.99x = 108,593.55 × 42,881.01
4. Step 4: Simplify right side
   78,690.99x = 4,656,601,103.49
5. Step 5: Solve for x
   x = 4,656,601,103.49/78,690.99
6. Step 6: Final answer
   x = 59,175.78