Finding the Fourth Proportional to 98,981.42, 136,558.56 and 65,008.31

Step by Step Solution

1. Step 1: Write the proportion equation
   98,981.42 : 136,558.56 = 65,008.31 : x
2. Step 2: Convert to fraction form
   98,981.42/136,558.56 = 65,008.31/x
3. Step 3: Cross multiply
   98,981.42x = 136,558.56 × 65,008.31
4. Step 4: Simplify right side
   98,981.42x = 8,877,440,973.06
5. Step 5: Solve for x
   x = 8,877,440,973.06/98,981.42
6. Step 6: Final answer
   x = 89,687.96