Finding the Fourth Proportional to 64,071.88, 88,388.52 and 40,186.60

Step by Step Solution

1. Step 1: Write the proportion equation
   64,071.88 : 88,388.52 = 40,186.60 : x
2. Step 2: Convert to fraction form
   64,071.88/88,388.52 = 40,186.60/x
3. Step 3: Cross multiply
   64,071.88x = 88,388.52 × 40,186.60
4. Step 4: Simplify right side
   64,071.88x = 3,552,034,097.83
5. Step 5: Solve for x
   x = 3,552,034,097.83/64,071.88
6. Step 6: Final answer
   x = 55,438.27