Finding the Fourth Proportional to 116,621.00, 160,986.63 and 78,402.71

Step by Step Solution

1. Step 1: Write the proportion equation
   116,621.00 : 160,986.63 = 78,402.71 : x
2. Step 2: Convert to fraction form
   116,621.00/160,986.63 = 78,402.71/x
3. Step 3: Cross multiply
   116,621.00x = 160,986.63 × 78,402.71
4. Step 4: Simplify right side
   116,621.00x = 12,621,788,065.77
5. Step 5: Solve for x
   x = 12,621,788,065.77/116,621.00
6. Step 6: Final answer
   x = 108,229.12