Finding the Fourth Proportional to 189,499.12, 284,144.22 and 77,150.56

Step by Step Solution

1. Step 1: Write the proportion equation
   189,499.12 : 284,144.22 = 77,150.56 : x
2. Step 2: Convert to fraction form
   189,499.12/284,144.22 = 77,150.56/x
3. Step 3: Cross multiply
   189,499.12x = 284,144.22 × 77,150.56
4. Step 4: Simplify right side
   189,499.12x = 21,921,885,693.76
5. Step 5: Solve for x
   x = 21,921,885,693.76/189,499.12
6. Step 6: Final answer
   x = 115,683.31