Finding the Fourth Proportional to 156,667.70, 235,131.15 and 72,557.30

Step by Step Solution

1. Step 1: Write the proportion equation
   156,667.70 : 235,131.15 = 72,557.30 : x
2. Step 2: Convert to fraction form
   156,667.70/235,131.15 = 72,557.30/x
3. Step 3: Cross multiply
   156,667.70x = 235,131.15 × 72,557.30
4. Step 4: Simplify right side
   156,667.70x = 17,060,481,389.90
5. Step 5: Solve for x
   x = 17,060,481,389.90/156,667.70
6. Step 6: Final answer
   x = 108,895.97