Finding the Fourth Proportional to 109,780.56, 151,407 and 67,309.20

Step by Step Solution

1. Step 1: Write the proportion equation
   109,780.56 : 151,407 = 67,309.20 : x
2. Step 2: Convert to fraction form
   109,780.56/151,407 = 67,309.20/x
3. Step 3: Cross multiply
   109,780.56x = 151,407 × 67,309.20
4. Step 4: Simplify right side
   109,780.56x = 10,191,084,044.40
5. Step 5: Solve for x
   x = 10,191,084,044.40/109,780.56
6. Step 6: Final answer
   x = 92,831.41