Finding the Fourth Proportional to 82,478.79, 123,720.75 and 64,692.81

Step by Step Solution

1. Step 1: Write the proportion equation
   82,478.79 : 123,720.75 = 64,692.81 : x
2. Step 2: Convert to fraction form
   82,478.79/123,720.75 = 64,692.81/x
3. Step 3: Cross multiply
   82,478.79x = 123,720.75 × 64,692.81
4. Step 4: Simplify right side
   82,478.79x = 8,003,842,972.81
5. Step 5: Solve for x
   x = 8,003,842,972.81/82,478.79
6. Step 6: Final answer
   x = 97,041.23