Finding the Fourth Proportional to 105,140.42, 157,710.61 and 58,054.90

Step by Step Solution

1. Step 1: Write the proportion equation
   105,140.42 : 157,710.61 = 58,054.90 : x
2. Step 2: Convert to fraction form
   105,140.42/157,710.61 = 58,054.90/x
3. Step 3: Cross multiply
   105,140.42x = 157,710.61 × 58,054.90
4. Step 4: Simplify right side
   105,140.42x = 9,155,873,370.78
5. Step 5: Solve for x
   x = 9,155,873,370.78/105,140.42
6. Step 6: Final answer
   x = 87,082.33