Finding the Fourth Proportional to 85,300.61, 127,688.47 and 55,654.61

Step by Step Solution

1. Step 1: Write the proportion equation
   85,300.61 : 127,688.47 = 55,654.61 : x
2. Step 2: Convert to fraction form
   85,300.61/127,688.47 = 55,654.61/x
3. Step 3: Cross multiply
   85,300.61x = 127,688.47 × 55,654.61
4. Step 4: Simplify right side
   85,300.61x = 7,106,451,221.77
5. Step 5: Solve for x
   x = 7,106,451,221.77/85,300.61
6. Step 6: Final answer
   x = 83,310.68