Finding the Fourth Proportional to 92,870.51, 139,329.32 and 42,986.52

Step by Step Solution

1. Step 1: Write the proportion equation
   92,870.51 : 139,329.32 = 42,986.52 : x
2. Step 2: Convert to fraction form
   92,870.51/139,329.32 = 42,986.52/x
3. Step 3: Cross multiply
   92,870.51x = 139,329.32 × 42,986.52
4. Step 4: Simplify right side
   92,870.51x = 5,989,282,385.83
5. Step 5: Solve for x
   x = 5,989,282,385.83/92,870.51
6. Step 6: Final answer
   x = 64,490.68