Finding the Fourth Proportional to 156,711.45, 235,196.78 and 72,601.05

Step by Step Solution

1. Step 1: Write the proportion equation
   156,711.45 : 235,196.78 = 72,601.05 : x
2. Step 2: Convert to fraction form
   156,711.45/235,196.78 = 72,601.05/x
3. Step 3: Cross multiply
   156,711.45x = 235,196.78 × 72,601.05
4. Step 4: Simplify right side
   156,711.45x = 17,075,532,821.61
5. Step 5: Solve for x
   x = 17,075,532,821.61/156,711.45
6. Step 6: Final answer
   x = 108,961.62