Finding the Fourth Proportional to 116,431, 160,674.78 and 63,439

Step by Step Solution

1. Step 1: Write the proportion equation
   116,431 : 160,674.78 = 63,439 : x
2. Step 2: Convert to fraction form
   116,431/160,674.78 = 63,439/x
3. Step 3: Cross multiply
   116,431x = 160,674.78 × 63,439
4. Step 4: Simplify right side
   116,431x = 10,193,047,368.42
5. Step 5: Solve for x
   x = 10,193,047,368.42/116,431
6. Step 6: Final answer
   x = 87,545.82