Finding the Fourth Proportional to 78,667.32, 108,466.89 and 64,274.10

Step by Step Solution

1. Step 1: Write the proportion equation
   78,667.32 : 108,466.89 = 64,274.10 : x
2. Step 2: Convert to fraction form
   78,667.32/108,466.89 = 64,274.10/x
3. Step 3: Cross multiply
   78,667.32x = 108,466.89 × 64,274.10
4. Step 4: Simplify right side
   78,667.32x = 6,971,611,734.55
5. Step 5: Solve for x
   x = 6,971,611,734.55/78,667.32
6. Step 6: Final answer
   x = 88,621.45