Finding the Fourth Proportional to 88,528.10, 133,051.35 and 77,123.30

Step by Step Solution

1. Step 1: Write the proportion equation
   88,528.10 : 133,051.35 = 77,123.30 : x
2. Step 2: Convert to fraction form
   88,528.10/133,051.35 = 77,123.30/x
3. Step 3: Cross multiply
   88,528.10x = 133,051.35 × 77,123.30
4. Step 4: Simplify right side
   88,528.10x = 10,261,359,181.46
5. Step 5: Solve for x
   x = 10,261,359,181.46/88,528.10
6. Step 6: Final answer
   x = 115,910.76