Finding the Fourth Proportional to 109,411.56, 150,988.61 and 61,016.55

Step by Step Solution

1. Step 1: Write the proportion equation
   109,411.56 : 150,988.61 = 61,016.55 : x
2. Step 2: Convert to fraction form
   109,411.56/150,988.61 = 61,016.55/x
3. Step 3: Cross multiply
   109,411.56x = 150,988.61 × 61,016.55
4. Step 4: Simplify right side
   109,411.56x = 9,212,803,657.83
5. Step 5: Solve for x
   x = 9,212,803,657.83/109,411.56
6. Step 6: Final answer
   x = 84,203.20