Finding the Fourth Proportional to 77,721.31, 116,564.50 and 30,337.57

Step by Step Solution

1. Step 1: Write the proportion equation
   77,721.31 : 116,564.50 = 30,337.57 : x
2. Step 2: Convert to fraction form
   77,721.31/116,564.50 = 30,337.57/x
3. Step 3: Cross multiply
   77,721.31x = 116,564.50 × 30,337.57
4. Step 4: Simplify right side
   77,721.31x = 3,536,283,678.27
5. Step 5: Solve for x
   x = 3,536,283,678.27/77,721.31
6. Step 6: Final answer
   x = 45,499.54