Finding the Fourth Proportional to 64,648.10, 89,214.10 and 35,970.50

Step by Step Solution

1. Step 1: Write the proportion equation
   64,648.10 : 89,214.10 = 35,970.50 : x
2. Step 2: Convert to fraction form
   64,648.10/89,214.10 = 35,970.50/x
3. Step 3: Cross multiply
   64,648.10x = 89,214.10 × 35,970.50
4. Step 4: Simplify right side
   64,648.10x = 3,209,075,784.05
5. Step 5: Solve for x
   x = 3,209,075,784.05/64,648.10
6. Step 6: Final answer
   x = 49,639.14