Finding the Fourth Proportional to 106,605.50, 147,128.55 and 61,893.50

Step by Step Solution

1. Step 1: Write the proportion equation
   106,605.50 : 147,128.55 = 61,893.50 : x
2. Step 2: Convert to fraction form
   106,605.50/147,128.55 = 61,893.50/x
3. Step 3: Cross multiply
   106,605.50x = 147,128.55 × 61,893.50
4. Step 4: Simplify right side
   106,605.50x = 9,106,300,909.43
5. Step 5: Solve for x
   x = 9,106,300,909.43/106,605.50
6. Step 6: Final answer
   x = 85,420.55