Finding the Fourth Proportional to 172,513.31, 238,068.65 and 100,880.15

Step by Step Solution

1. Step 1: Write the proportion equation
   172,513.31 : 238,068.65 = 100,880.15 : x
2. Step 2: Convert to fraction form
   172,513.31/238,068.65 = 100,880.15/x
3. Step 3: Cross multiply
   172,513.31x = 238,068.65 × 100,880.15
4. Step 4: Simplify right side
   172,513.31x = 24,016,400,184.15
5. Step 5: Solve for x
   x = 24,016,400,184.15/172,513.31
6. Step 6: Final answer
   x = 139,214.77