Finding the Fourth Proportional to 83,588.40, 115,397.04 and 64,566.72

Step by Step Solution

1. Step 1: Write the proportion equation
   83,588.40 : 115,397.04 = 64,566.72 : x
2. Step 2: Convert to fraction form
   83,588.40/115,397.04 = 64,566.72/x
3. Step 3: Cross multiply
   83,588.40x = 115,397.04 × 64,566.72
4. Step 4: Simplify right side
   83,588.40x = 7,450,808,370.51
5. Step 5: Solve for x
   x = 7,450,808,370.51/83,588.40
6. Step 6: Final answer
   x = 89,136.87