Finding the Fourth Proportional to 56,008.72, 77,292.02 and 30,858.20

Step by Step Solution

1. Step 1: Write the proportion equation
   56,008.72 : 77,292.02 = 30,858.20 : x
2. Step 2: Convert to fraction form
   56,008.72/77,292.02 = 30,858.20/x
3. Step 3: Cross multiply
   56,008.72x = 77,292.02 × 30,858.20
4. Step 4: Simplify right side
   56,008.72x = 2,385,092,611.56
5. Step 5: Solve for x
   x = 2,385,092,611.56/56,008.72
6. Step 6: Final answer
   x = 42,584.31