Finding the Fourth Proportional to 92,888.15, 128,196.59 and 55,162.40

Step by Step Solution

1. Step 1: Write the proportion equation
   92,888.15 : 128,196.59 = 55,162.40 : x
2. Step 2: Convert to fraction form
   92,888.15/128,196.59 = 55,162.40/x
3. Step 3: Cross multiply
   92,888.15x = 128,196.59 × 55,162.40
4. Step 4: Simplify right side
   92,888.15x = 7,071,630,659.42
5. Step 5: Solve for x
   x = 7,071,630,659.42/92,888.15
6. Step 6: Final answer
   x = 76,130.60