Finding the Fourth Proportional to 115,925.34, 159,968.88 and 64,929.36

Step by Step Solution

1. Step 1: Write the proportion equation
   115,925.34 : 159,968.88 = 64,929.36 : x
2. Step 2: Convert to fraction form
   115,925.34/159,968.88 = 64,929.36/x
3. Step 3: Cross multiply
   115,925.34x = 159,968.88 × 64,929.36
4. Step 4: Simplify right side
   115,925.34x = 10,386,676,998.32
5. Step 5: Solve for x
   x = 10,386,676,998.32/115,925.34
6. Step 6: Final answer
   x = 89,597.99