Finding the Fourth Proportional to 139,097.71, 208,688.15 and 98,649.15

Step by Step Solution

1. Step 1: Write the proportion equation
   139,097.71 : 208,688.15 = 98,649.15 : x
2. Step 2: Convert to fraction form
   139,097.71/208,688.15 = 98,649.15/x
3. Step 3: Cross multiply
   139,097.71x = 208,688.15 × 98,649.15
4. Step 4: Simplify right side
   139,097.71x = 20,586,908,612.57
5. Step 5: Solve for x
   x = 20,586,908,612.57/139,097.71
6. Step 6: Final answer
   x = 148,003.22