Finding the Fourth Proportional to 64,284.80, 88,667.48 and 55,316.89

Step by Step Solution

1. Step 1: Write the proportion equation
   64,284.80 : 88,667.48 = 55,316.89 : x
2. Step 2: Convert to fraction form
   64,284.80/88,667.48 = 55,316.89/x
3. Step 3: Cross multiply
   64,284.80x = 88,667.48 × 55,316.89
4. Step 4: Simplify right side
   64,284.80x = 4,904,808,517.82
5. Step 5: Solve for x
   x = 4,904,808,517.82/64,284.80
6. Step 6: Final answer
   x = 76,298.11