Finding the Fourth Proportional to 56,021.32, 77,308.42 and 30,527.90

Step by Step Solution

1. Step 1: Write the proportion equation
   56,021.32 : 77,308.42 = 30,527.90 : x
2. Step 2: Convert to fraction form
   56,021.32/77,308.42 = 30,527.90/x
3. Step 3: Cross multiply
   56,021.32x = 77,308.42 × 30,527.90
4. Step 4: Simplify right side
   56,021.32x = 2,360,063,714.92
5. Step 5: Solve for x
   x = 2,360,063,714.92/56,021.32
6. Step 6: Final answer
   x = 42,127.96