Finding the Fourth Proportional to 90,060.05, 124,189.40 and 77,355

Step by Step Solution

1. Step 1: Write the proportion equation
   90,060.05 : 124,189.40 = 77,355 : x
2. Step 2: Convert to fraction form
   90,060.05/124,189.40 = 77,355/x
3. Step 3: Cross multiply
   90,060.05x = 124,189.40 × 77,355
4. Step 4: Simplify right side
   90,060.05x = 9,606,671,230.39
5. Step 5: Solve for x
   x = 9,606,671,230.39/90,060.05
6. Step 6: Final answer
   x = 106,669.62