Finding the Fourth Proportional to 147,770.61, 203,931.32 and 84,128.91

Step by Step Solution

1. Step 1: Write the proportion equation
   147,770.61 : 203,931.32 = 84,128.91 : x
2. Step 2: Convert to fraction form
   147,770.61/203,931.32 = 84,128.91/x
3. Step 3: Cross multiply
   147,770.61x = 203,931.32 × 84,128.91
4. Step 4: Simplify right side
   147,770.61x = 17,156,519,245.82
5. Step 5: Solve for x
   x = 17,156,519,245.82/147,770.61
6. Step 6: Final answer
   x = 116,102.38