Finding the Fourth Proportional to 78,666.06, 108,558.99 and 42,856.38

Step by Step Solution

1. Step 1: Write the proportion equation
   78,666.06 : 108,558.99 = 42,856.38 : x
2. Step 2: Convert to fraction form
   78,666.06/108,558.99 = 42,856.38/x
3. Step 3: Cross multiply
   78,666.06x = 108,558.99 × 42,856.38
4. Step 4: Simplify right side
   78,666.06x = 4,652,445,327.86
5. Step 5: Solve for x
   x = 4,652,445,327.86/78,666.06
6. Step 6: Final answer
   x = 59,141.71