Finding the Fourth Proportional to 153,402.72, 229,955.52 and 78,558.12

Step by Step Solution

1. Step 1: Write the proportion equation
   153,402.72 : 229,955.52 = 78,558.12 : x
2. Step 2: Convert to fraction form
   153,402.72/229,955.52 = 78,558.12/x
3. Step 3: Cross multiply
   153,402.72x = 229,955.52 × 78,558.12
4. Step 4: Simplify right side
   153,402.72x = 18,064,873,334.82
5. Step 5: Solve for x
   x = 18,064,873,334.82/153,402.72
6. Step 6: Final answer
   x = 117,761.10