Finding the Fourth Proportional to 153,308.16, 229,688.64 and 83,142.72

Step by Step Solution

1. Step 1: Write the proportion equation
   153,308.16 : 229,688.64 = 83,142.72 : x
2. Step 2: Convert to fraction form
   153,308.16/229,688.64 = 83,142.72/x
3. Step 3: Cross multiply
   153,308.16x = 229,688.64 × 83,142.72
4. Step 4: Simplify right side
   153,308.16x = 19,096,938,282.70
5. Step 5: Solve for x
   x = 19,096,938,282.70/153,308.16
6. Step 6: Final answer
   x = 124,565.70