Finding the Fourth Proportional to 100,434.96, 138,595.59 and 55,111.82

Step by Step Solution

1. Step 1: Write the proportion equation
   100,434.96 : 138,595.59 = 55,111.82 : x
2. Step 2: Convert to fraction form
   100,434.96/138,595.59 = 55,111.82/x
3. Step 3: Cross multiply
   100,434.96x = 138,595.59 × 55,111.82
4. Step 4: Simplify right side
   100,434.96x = 7,638,254,515.90
5. Step 5: Solve for x
   x = 7,638,254,515.90/100,434.96
6. Step 6: Final answer
   x = 76,051.75