Finding the Fourth Proportional to 109,420.80, 164,065.48 and 42,781.52

Step by Step Solution

1. Step 1: Write the proportion equation
   109,420.80 : 164,065.48 = 42,781.52 : x
2. Step 2: Convert to fraction form
   109,420.80/164,065.48 = 42,781.52/x
3. Step 3: Cross multiply
   109,420.80x = 164,065.48 × 42,781.52
4. Step 4: Simplify right side
   109,420.80x = 7,018,970,613.93
5. Step 5: Solve for x
   x = 7,018,970,613.93/109,420.80
6. Step 6: Final answer
   x = 64,146.58