Finding the Fourth Proportional to 156,448.72, 215,899.24 and 84,828.72

Step by Step Solution

1. Step 1: Write the proportion equation
   156,448.72 : 215,899.24 = 84,828.72 : x
2. Step 2: Convert to fraction form
   156,448.72/215,899.24 = 84,828.72/x
3. Step 3: Cross multiply
   156,448.72x = 215,899.24 × 84,828.72
4. Step 4: Simplify right side
   156,448.72x = 18,314,456,178.17
5. Step 5: Solve for x
   x = 18,314,456,178.17/156,448.72
6. Step 6: Final answer
   x = 117,063.64