Finding the Fourth Proportional to 105,488.18, 145,641.61 and 94,138.19

Step by Step Solution

1. Step 1: Write the proportion equation
   105,488.18 : 145,641.61 = 94,138.19 : x
2. Step 2: Convert to fraction form
   105,488.18/145,641.61 = 94,138.19/x
3. Step 3: Cross multiply
   105,488.18x = 145,641.61 × 94,138.19
4. Step 4: Simplify right side
   105,488.18x = 13,710,437,554.09
5. Step 5: Solve for x
   x = 13,710,437,554.09/105,488.18
6. Step 6: Final answer
   x = 129,971.32