Finding the Fourth Proportional to 98,487.56, 147,731.31 and 78,673.34

Step by Step Solution

1. Step 1: Write the proportion equation
   98,487.56 : 147,731.31 = 78,673.34 : x
2. Step 2: Convert to fraction form
   98,487.56/147,731.31 = 78,673.34/x
3. Step 3: Cross multiply
   98,487.56x = 147,731.31 × 78,673.34
4. Step 4: Simplify right side
   98,487.56x = 11,622,515,949.60
5. Step 5: Solve for x
   x = 11,622,515,949.60/98,487.56
6. Step 6: Final answer
   x = 118,009.99