Finding the Fourth Proportional to 156,784.64, 216,362.24 and 89,716.48

Step by Step Solution

1. Step 1: Write the proportion equation
   156,784.64 : 216,362.24 = 89,716.48 : x
2. Step 2: Convert to fraction form
   156,784.64/216,362.24 = 89,716.48/x
3. Step 3: Cross multiply
   156,784.64x = 216,362.24 × 89,716.48
4. Step 4: Simplify right side
   156,784.64x = 19,411,258,577.72
5. Step 5: Solve for x
   x = 19,411,258,577.72/156,784.64
6. Step 6: Final answer
   x = 123,808.42