Finding the Fourth Proportional to 105,800.42, 145,981.76 and 61,062.50

Step by Step Solution

1. Step 1: Write the proportion equation
   105,800.42 : 145,981.76 = 61,062.50 : x
2. Step 2: Convert to fraction form
   105,800.42/145,981.76 = 61,062.50/x
3. Step 3: Cross multiply
   105,800.42x = 145,981.76 × 61,062.50
4. Step 4: Simplify right side
   105,800.42x = 8,914,011,220
5. Step 5: Solve for x
   x = 8,914,011,220/105,800.42
6. Step 6: Final answer
   x = 84,253.08