Finding the Fourth Proportional to 56,128.36, 77,454.72 and 30,634.08

Step by Step Solution

1. Step 1: Write the proportion equation
   56,128.36 : 77,454.72 = 30,634.08 : x
2. Step 2: Convert to fraction form
   56,128.36/77,454.72 = 30,634.08/x
3. Step 3: Cross multiply
   56,128.36x = 77,454.72 × 30,634.08
4. Step 4: Simplify right side
   56,128.36x = 2,372,754,088.86
5. Step 5: Solve for x
   x = 2,372,754,088.86/56,128.36
6. Step 6: Final answer
   x = 42,273.71