Finding the Fourth Proportional to 56,379.61, 77,802.98 and 30,885.76

Step by Step Solution

1. Step 1: Write the proportion equation
   56,379.61 : 77,802.98 = 30,885.76 : x
2. Step 2: Convert to fraction form
   56,379.61/77,802.98 = 30,885.76/x
3. Step 3: Cross multiply
   56,379.61x = 77,802.98 × 30,885.76
4. Step 4: Simplify right side
   56,379.61x = 2,403,004,167.56
5. Step 5: Solve for x
   x = 2,403,004,167.56/56,379.61
6. Step 6: Final answer
   x = 42,621.87