Finding the Fourth Proportional to 208,061.46, 312,139.05 and 65,915.34

Step by Step Solution

1. Step 1: Write the proportion equation
   208,061.46 : 312,139.05 = 65,915.34 : x
2. Step 2: Convert to fraction form
   208,061.46/312,139.05 = 65,915.34/x
3. Step 3: Cross multiply
   208,061.46x = 312,139.05 × 65,915.34
4. Step 4: Simplify right side
   208,061.46x = 20,574,751,608.03
5. Step 5: Solve for x
   x = 20,574,751,608.03/208,061.46
6. Step 6: Final answer
   x = 98,887.86