Finding the Fourth Proportional to 98,047.20, 147,144.96 and 71,820.12

Step by Step Solution

1. Step 1: Write the proportion equation
   98,047.20 : 147,144.96 = 71,820.12 : x
2. Step 2: Convert to fraction form
   98,047.20/147,144.96 = 71,820.12/x
3. Step 3: Cross multiply
   98,047.20x = 147,144.96 × 71,820.12
4. Step 4: Simplify right side
   98,047.20x = 10,567,968,684.60
5. Step 5: Solve for x
   x = 10,567,968,684.60/98,047.20
6. Step 6: Final answer
   x = 107,784.50