Finding the Fourth Proportional to 89,810.74, 134,628.09 and 76,513.78

Step by Step Solution

1. Step 1: Write the proportion equation
   89,810.74 : 134,628.09 = 76,513.78 : x
2. Step 2: Convert to fraction form
   89,810.74/134,628.09 = 76,513.78/x
3. Step 3: Cross multiply
   89,810.74x = 134,628.09 × 76,513.78
4. Step 4: Simplify right side
   89,810.74x = 10,300,904,060.08
5. Step 5: Solve for x
   x = 10,300,904,060.08/89,810.74
6. Step 6: Final answer
   x = 114,695.68