Finding the Fourth Proportional to 139,348.33, 208,667.48 and 91,819.35

Step by Step Solution

1. Step 1: Write the proportion equation
   139,348.33 : 208,667.48 = 91,819.35 : x
2. Step 2: Convert to fraction form
   139,348.33/208,667.48 = 91,819.35/x
3. Step 3: Cross multiply
   139,348.33x = 208,667.48 × 91,819.35
4. Step 4: Simplify right side
   139,348.33x = 19,159,711,920.64
5. Step 5: Solve for x
   x = 19,159,711,920.64/139,348.33
6. Step 6: Final answer
   x = 137,495.10