Finding the Fourth Proportional to 138,443.30, 191,051.75 and 74,781.09

Step by Step Solution

1. Step 1: Write the proportion equation
   138,443.30 : 191,051.75 = 74,781.09 : x
2. Step 2: Convert to fraction form
   138,443.30/191,051.75 = 74,781.09/x
3. Step 3: Cross multiply
   138,443.30x = 191,051.75 × 74,781.09
4. Step 4: Simplify right side
   138,443.30x = 14,287,058,111.41
5. Step 5: Solve for x
   x = 14,287,058,111.41/138,443.30
6. Step 6: Final answer
   x = 103,197.90