Finding the Fourth Proportional to 142,242.94, 196,300.88 and 81,813.50

Step by Step Solution

1. Step 1: Write the proportion equation
   142,242.94 : 196,300.88 = 81,813.50 : x
2. Step 2: Convert to fraction form
   142,242.94/196,300.88 = 81,813.50/x
3. Step 3: Cross multiply
   142,242.94x = 196,300.88 × 81,813.50
4. Step 4: Simplify right side
   142,242.94x = 16,060,062,045.88
5. Step 5: Solve for x
   x = 16,060,062,045.88/142,242.94
6. Step 6: Final answer
   x = 112,905.86