Finding the Fourth Proportional to 156,667.16, 216,228.30 and 88,688.00

Step by Step Solution

1. Step 1: Write the proportion equation
   156,667.16 : 216,228.30 = 88,688.00 : x
2. Step 2: Convert to fraction form
   156,667.16/216,228.30 = 88,688.00/x
3. Step 3: Cross multiply
   156,667.16x = 216,228.30 × 88,688.00
4. Step 4: Simplify right side
   156,667.16x = 19,176,855,678.39
5. Step 5: Solve for x
   x = 19,176,855,678.39/156,667.16
6. Step 6: Final answer
   x = 122,405.07