Finding the Fourth Proportional to 100,906.72, 139,105.80 and 70,598.14

Step by Step Solution

1. Step 1: Write the proportion equation
   100,906.72 : 139,105.80 = 70,598.14 : x
2. Step 2: Convert to fraction form
   100,906.72/139,105.80 = 70,598.14/x
3. Step 3: Cross multiply
   100,906.72x = 139,105.80 × 70,598.14
4. Step 4: Simplify right side
   100,906.72x = 9,820,610,743.21
5. Step 5: Solve for x
   x = 9,820,610,743.21/100,906.72
6. Step 6: Final answer
   x = 97,323.65