Finding the Fourth Proportional to 92,688.31, 139,074.01 and 42,741.64

Step by Step Solution

1. Step 1: Write the proportion equation
   92,688.31 : 139,074.01 = 42,741.64 : x
2. Step 2: Convert to fraction form
   92,688.31/139,074.01 = 42,741.64/x
3. Step 3: Cross multiply
   92,688.31x = 139,074.01 × 42,741.64
4. Step 4: Simplify right side
   92,688.31x = 5,944,250,718.99
5. Step 5: Solve for x
   x = 5,944,250,718.99/92,688.31
6. Step 6: Final answer
   x = 64,131.61