Finding the Fourth Proportional to 93,213.72, 139,116.24 and 86,893.29

Step by Step Solution

1. Step 1: Write the proportion equation
   93,213.72 : 139,116.24 = 86,893.29 : x
2. Step 2: Convert to fraction form
   93,213.72/139,116.24 = 86,893.29/x
3. Step 3: Cross multiply
   93,213.72x = 139,116.24 × 86,893.29
4. Step 4: Simplify right side
   93,213.72x = 12,088,267,786.03
5. Step 5: Solve for x
   x = 12,088,267,786.03/93,213.72
6. Step 6: Final answer
   x = 129,683.35