Finding the Fourth Proportional to 153,003.60, 229,272.12 and 78,120.72

Step by Step Solution

1. Step 1: Write the proportion equation
   153,003.60 : 229,272.12 = 78,120.72 : x
2. Step 2: Convert to fraction form
   153,003.60/229,272.12 = 78,120.72/x
3. Step 3: Cross multiply
   153,003.60x = 229,272.12 × 78,120.72
4. Step 4: Simplify right side
   153,003.60x = 17,910,903,090.33
5. Step 5: Solve for x
   x = 17,910,903,090.33/153,003.60
6. Step 6: Final answer
   x = 117,061.97