Finding the Fourth Proportional to 109,117.50, 150,570.42 and 61,360.72

Step by Step Solution

1. Step 1: Write the proportion equation
   109,117.50 : 150,570.42 = 61,360.72 : x
2. Step 2: Convert to fraction form
   109,117.50/150,570.42 = 61,360.72/x
3. Step 3: Cross multiply
   109,117.50x = 150,570.42 × 61,360.72
4. Step 4: Simplify right side
   109,117.50x = 9,239,109,381.90
5. Step 5: Solve for x
   x = 9,239,109,381.90/109,117.50
6. Step 6: Final answer
   x = 84,671.20