Finding the Fourth Proportional to 92,808.71, 139,033.98 and 55,398.72

Step by Step Solution

1. Step 1: Write the proportion equation
   92,808.71 : 139,033.98 = 55,398.72 : x
2. Step 2: Convert to fraction form
   92,808.71/139,033.98 = 55,398.72/x
3. Step 3: Cross multiply
   92,808.71x = 139,033.98 × 55,398.72
4. Step 4: Simplify right side
   92,808.71x = 7,702,304,528.51
5. Step 5: Solve for x
   x = 7,702,304,528.51/92,808.71
6. Step 6: Final answer
   x = 82,991.19