Finding the Fourth Proportional to 129,219.31, 193,826.52 and 70,429.10

Step by Step Solution

1. Step 1: Write the proportion equation
   129,219.31 : 193,826.52 = 70,429.10 : x
2. Step 2: Convert to fraction form
   129,219.31/193,826.52 = 70,429.10/x
3. Step 3: Cross multiply
   129,219.31x = 193,826.52 × 70,429.10
4. Step 4: Simplify right side
   129,219.31x = 13,651,027,359.73
5. Step 5: Solve for x
   x = 13,651,027,359.73/129,219.31
6. Step 6: Final answer
   x = 105,642.32