Finding the Fourth Proportional to 117,402.78, 162,030.47 and 77,149.83

Step by Step Solution

1. Step 1: Write the proportion equation
   117,402.78 : 162,030.47 = 77,149.83 : x
2. Step 2: Convert to fraction form
   117,402.78/162,030.47 = 77,149.83/x
3. Step 3: Cross multiply
   117,402.78x = 162,030.47 × 77,149.83
4. Step 4: Simplify right side
   117,402.78x = 12,500,622,829.57
5. Step 5: Solve for x
   x = 12,500,622,829.57/117,402.78
6. Step 6: Final answer
   x = 106,476.38