Finding the Fourth Proportional to 91,907.60, 137,893.80 and 88,667.60

Step by Step Solution

1. Step 1: Write the proportion equation
   91,907.60 : 137,893.80 = 88,667.60 : x
2. Step 2: Convert to fraction form
   91,907.60/137,893.80 = 88,667.60/x
3. Step 3: Cross multiply
   91,907.60x = 137,893.80 × 88,667.60
4. Step 4: Simplify right side
   91,907.60x = 12,226,712,300.88
5. Step 5: Solve for x
   x = 12,226,712,300.88/91,907.60
6. Step 6: Final answer
   x = 133,032.66