Finding the Fourth Proportional to 123,998.91, 171,131.88 and 70,278.17

Step by Step Solution

1. Step 1: Write the proportion equation
   123,998.91 : 171,131.88 = 70,278.17 : x
2. Step 2: Convert to fraction form
   123,998.91/171,131.88 = 70,278.17/x
3. Step 3: Cross multiply
   123,998.91x = 171,131.88 × 70,278.17
4. Step 4: Simplify right side
   123,998.91x = 12,026,834,499.40
5. Step 5: Solve for x
   x = 12,026,834,499.40/123,998.91
6. Step 6: Final answer
   x = 96,991.45