Finding the Fourth Proportional to 56,397.48, 77,825.18 and 30,898.78

Step by Step Solution

1. Step 1: Write the proportion equation
   56,397.48 : 77,825.18 = 30,898.78 : x
2. Step 2: Convert to fraction form
   56,397.48/77,825.18 = 30,898.78/x
3. Step 3: Cross multiply
   56,397.48x = 77,825.18 × 30,898.78
4. Step 4: Simplify right side
   56,397.48x = 2,404,703,115.28
5. Step 5: Solve for x
   x = 2,404,703,115.28/56,397.48
6. Step 6: Final answer
   x = 42,638.49