Finding the Fourth Proportional to 139,433.32, 208,978.64 and 64,452.02

Step by Step Solution

1. Step 1: Write the proportion equation
   139,433.32 : 208,978.64 = 64,452.02 : x
2. Step 2: Convert to fraction form
   139,433.32/208,978.64 = 64,452.02/x
3. Step 3: Cross multiply
   139,433.32x = 208,978.64 × 64,452.02
4. Step 4: Simplify right side
   139,433.32x = 13,469,095,484.85
5. Step 5: Solve for x
   x = 13,469,095,484.85/139,433.32
6. Step 6: Final answer
   x = 96,598.83