Finding the Fourth Proportional to 357,086.72, 535,616.04 and 120,424.16

Step by Step Solution

1. Step 1: Write the proportion equation
   357,086.72 : 535,616.04 = 120,424.16 : x
2. Step 2: Convert to fraction form
   357,086.72/535,616.04 = 120,424.16/x
3. Step 3: Cross multiply
   357,086.72x = 535,616.04 × 120,424.16
4. Step 4: Simplify right side
   357,086.72x = 64,501,111,699.53
5. Step 5: Solve for x
   x = 64,501,111,699.53/357,086.72
6. Step 6: Final answer
   x = 180,631.51