Finding the Fourth Proportional to 100,434.00, 138,598.53 and 55,112.74

Step by Step Solution

1. Step 1: Write the proportion equation
   100,434.00 : 138,598.53 = 55,112.74 : x
2. Step 2: Convert to fraction form
   100,434.00/138,598.53 = 55,112.74/x
3. Step 3: Cross multiply
   100,434.00x = 138,598.53 × 55,112.74
4. Step 4: Simplify right side
   100,434.00x = 7,638,544,748.27
5. Step 5: Solve for x
   x = 7,638,544,748.27/100,434.00
6. Step 6: Final answer
   x = 76,055.37