Finding the Fourth Proportional to 142,974.10, 214,315.35 and 83,779.30

Step by Step Solution

1. Step 1: Write the proportion equation
   142,974.10 : 214,315.35 = 83,779.30 : x
2. Step 2: Convert to fraction form
   142,974.10/214,315.35 = 83,779.30/x
3. Step 3: Cross multiply
   142,974.10x = 214,315.35 × 83,779.30
4. Step 4: Simplify right side
   142,974.10x = 17,955,190,002.26
5. Step 5: Solve for x
   x = 17,955,190,002.26/142,974.10
6. Step 6: Final answer
   x = 125,583.51