Finding the Fourth Proportional to 108,881.34, 150,258.42 and 61,139.40

Step by Step Solution

1. Step 1: Write the proportion equation
   108,881.34 : 150,258.42 = 61,139.40 : x
2. Step 2: Convert to fraction form
   108,881.34/150,258.42 = 61,139.40/x
3. Step 3: Cross multiply
   108,881.34x = 150,258.42 × 61,139.40
4. Step 4: Simplify right side
   108,881.34x = 9,186,709,643.75
5. Step 5: Solve for x
   x = 9,186,709,643.75/108,881.34
6. Step 6: Final answer
   x = 84,373.59