Finding the Fourth Proportional to 92,689.51, 139,075.80 and 42,742.83

Step by Step Solution

1. Step 1: Write the proportion equation
   92,689.51 : 139,075.80 = 42,742.83 : x
2. Step 2: Convert to fraction form
   92,689.51/139,075.80 = 42,742.83/x
3. Step 3: Cross multiply
   92,689.51x = 139,075.80 × 42,742.83
4. Step 4: Simplify right side
   92,689.51x = 5,944,493,622.51
5. Step 5: Solve for x
   x = 5,944,493,622.51/92,689.51
6. Step 6: Final answer
   x = 64,133.40