Finding the Fourth Proportional to 139,011.59, 191,818.82 and 98,710.65

Step by Step Solution

1. Step 1: Write the proportion equation
   139,011.59 : 191,818.82 = 98,710.65 : x
2. Step 2: Convert to fraction form
   139,011.59/191,818.82 = 98,710.65/x
3. Step 3: Cross multiply
   139,011.59x = 191,818.82 × 98,710.65
4. Step 4: Simplify right side
   139,011.59x = 18,934,560,404.43
5. Step 5: Solve for x
   x = 18,934,560,404.43/139,011.59
6. Step 6: Final answer
   x = 136,208.50