Finding the Fourth Proportional to 63,618.30, 89,188.50 and 63,618.30

Step by Step Solution

1. Step 1: Write the proportion equation
   63,618.30 : 89,188.50 = 63,618.30 : x
2. Step 2: Convert to fraction form
   63,618.30/89,188.50 = 63,618.30/x
3. Step 3: Cross multiply
   63,618.30x = 89,188.50 × 63,618.30
4. Step 4: Simplify right side
   63,618.30x = 5,674,020,749.55
5. Step 5: Solve for x
   x = 5,674,020,749.55/63,618.30
6. Step 6: Final answer
   x = 89,188.50