Finding the Fourth Proportional to 133,419.15, 184,111.56 and 72,978.03

Step by Step Solution

1. Step 1: Write the proportion equation
   133,419.15 : 184,111.56 = 72,978.03 : x
2. Step 2: Convert to fraction form
   133,419.15/184,111.56 = 72,978.03/x
3. Step 3: Cross multiply
   133,419.15x = 184,111.56 × 72,978.03
4. Step 4: Simplify right side
   133,419.15x = 13,436,098,949.03
5. Step 5: Solve for x
   x = 13,436,098,949.03/133,419.15
6. Step 6: Final answer
   x = 100,705.93