Finding the Fourth Proportional to 140,407.88, 210,493.34 and 65,488.54

Step by Step Solution

1. Step 1: Write the proportion equation
   140,407.88 : 210,493.34 = 65,488.54 : x
2. Step 2: Convert to fraction form
   140,407.88/210,493.34 = 65,488.54/x
3. Step 3: Cross multiply
   140,407.88x = 210,493.34 × 65,488.54
4. Step 4: Simplify right side
   140,407.88x = 13,784,901,516.32
5. Step 5: Solve for x
   x = 13,784,901,516.32/140,407.88
6. Step 6: Final answer
   x = 98,177.55