Finding the Fourth Proportional to 139,422.81, 208,962.90 and 64,441.52

Step by Step Solution

1. Step 1: Write the proportion equation
   139,422.81 : 208,962.90 = 64,441.52 : x
2. Step 2: Convert to fraction form
   139,422.81/208,962.90 = 64,441.52/x
3. Step 3: Cross multiply
   139,422.81x = 208,962.90 × 64,441.52
4. Step 4: Simplify right side
   139,422.81x = 13,465,885,854.79
5. Step 5: Solve for x
   x = 13,465,885,854.79/139,422.81
6. Step 6: Final answer
   x = 96,583.09