Finding the Fourth Proportional to 116,388.83, 160,604.12 and 78,140.63

Step by Step Solution

1. Step 1: Write the proportion equation
   116,388.83 : 160,604.12 = 78,140.63 : x
2. Step 2: Convert to fraction form
   116,388.83/160,604.12 = 78,140.63/x
3. Step 3: Cross multiply
   116,388.83x = 160,604.12 × 78,140.63
4. Step 4: Simplify right side
   116,388.83x = 12,549,706,726.69
5. Step 5: Solve for x
   x = 12,549,706,726.69/116,388.83
6. Step 6: Final answer
   x = 107,825.70