Finding the Fourth Proportional to 65,312.95, 89,544.81 and 64,131.97

Step by Step Solution

1. Step 1: Write the proportion equation
   65,312.95 : 89,544.81 = 64,131.97 : x
2. Step 2: Convert to fraction form
   65,312.95/89,544.81 = 64,131.97/x
3. Step 3: Cross multiply
   65,312.95x = 89,544.81 × 64,131.97
4. Step 4: Simplify right side
   65,312.95x = 5,742,684,300.19
5. Step 5: Solve for x
   x = 5,742,684,300.19/65,312.95
6. Step 6: Final answer
   x = 87,925.67