Finding the Fourth Proportional to 137,040.72, 189,117.60 and 76,614.72

Step by Step Solution

1. Step 1: Write the proportion equation
   137,040.72 : 189,117.60 = 76,614.72 : x
2. Step 2: Convert to fraction form
   137,040.72/189,117.60 = 76,614.72/x
3. Step 3: Cross multiply
   137,040.72x = 189,117.60 × 76,614.72
4. Step 4: Simplify right side
   137,040.72x = 14,489,191,971.07
5. Step 5: Solve for x
   x = 14,489,191,971.07/137,040.72
6. Step 6: Final answer
   x = 105,729.10