Finding the Fourth Proportional to 109,139.37, 150,610.89 and 61,392.70

Step by Step Solution

1. Step 1: Write the proportion equation
   109,139.37 : 150,610.89 = 61,392.70 : x
2. Step 2: Convert to fraction form
   109,139.37/150,610.89 = 61,392.70/x
3. Step 3: Cross multiply
   109,139.37x = 150,610.89 × 61,392.70
4. Step 4: Simplify right side
   109,139.37x = 9,246,409,186.50
5. Step 5: Solve for x
   x = 9,246,409,186.50/109,139.37
6. Step 6: Final answer
   x = 84,721.12