Finding the Fourth Proportional to 98,907.56, 147,641.86 and 91,598.12

Step by Step Solution

1. Step 1: Write the proportion equation
   98,907.56 : 147,641.86 = 91,598.12 : x
2. Step 2: Convert to fraction form
   98,907.56/147,641.86 = 91,598.12/x
3. Step 3: Cross multiply
   98,907.56x = 147,641.86 × 91,598.12
4. Step 4: Simplify right side
   98,907.56x = 13,523,716,809.30
5. Step 5: Solve for x
   x = 13,523,716,809.30/98,907.56
6. Step 6: Final answer
   x = 136,730.87