Finding the Fourth Proportional to 136,485.79, 204,843.71 and 57,656.59

Step by Step Solution

1. Step 1: Write the proportion equation
   136,485.79 : 204,843.71 = 57,656.59 : x
2. Step 2: Convert to fraction form
   136,485.79/204,843.71 = 57,656.59/x
3. Step 3: Cross multiply
   136,485.79x = 204,843.71 × 57,656.59
4. Step 4: Simplify right side
   136,485.79x = 11,810,589,801.55
5. Step 5: Solve for x
   x = 11,810,589,801.55/136,485.79
6. Step 6: Final answer
   x = 86,533.48