Finding the Fourth Proportional to 89,058.06, 133,373.79 and 64,978.38

Step by Step Solution

1. Step 1: Write the proportion equation
   89,058.06 : 133,373.79 = 64,978.38 : x
2. Step 2: Convert to fraction form
   89,058.06/133,373.79 = 64,978.38/x
3. Step 3: Cross multiply
   89,058.06x = 133,373.79 × 64,978.38
4. Step 4: Simplify right side
   89,058.06x = 8,666,412,808.66
5. Step 5: Solve for x
   x = 8,666,412,808.66/89,058.06
6. Step 6: Final answer
   x = 97,311.94