Finding the Fourth Proportional to 109,500.08, 150,980.56 and 77,240

Step by Step Solution

1. Step 1: Write the proportion equation
   109,500.08 : 150,980.56 = 77,240 : x
2. Step 2: Convert to fraction form
   109,500.08/150,980.56 = 77,240/x
3. Step 3: Cross multiply
   109,500.08x = 150,980.56 × 77,240
4. Step 4: Simplify right side
   109,500.08x = 11,661,738,454.40
5. Step 5: Solve for x
   x = 11,661,738,454.40/109,500.08
6. Step 6: Final answer
   x = 106,499.82