Finding the Fourth Proportional to 56,407.86, 77,843.76 and 30,916.67

Step by Step Solution

1. Step 1: Write the proportion equation
   56,407.86 : 77,843.76 = 30,916.67 : x
2. Step 2: Convert to fraction form
   56,407.86/77,843.76 = 30,916.67/x
3. Step 3: Cross multiply
   56,407.86x = 77,843.76 × 30,916.67
4. Step 4: Simplify right side
   56,407.86x = 2,406,669,334.32
5. Step 5: Solve for x
   x = 2,406,669,334.32/56,407.86
6. Step 6: Final answer
   x = 42,665.50