Finding the Fourth Proportional to 103,518.57, 142,860.69 and 58,210.81

Step by Step Solution

1. Step 1: Write the proportion equation
   103,518.57 : 142,860.69 = 58,210.81 : x
2. Step 2: Convert to fraction form
   103,518.57/142,860.69 = 58,210.81/x
3. Step 3: Cross multiply
   103,518.57x = 142,860.69 × 58,210.81
4. Step 4: Simplify right side
   103,518.57x = 8,316,036,482.06
5. Step 5: Solve for x
   x = 8,316,036,482.06/103,518.57
6. Step 6: Final answer
   x = 80,333.77