Finding the Fourth Proportional to 98,538.02, 147,788.58 and 31,978.72

Step by Step Solution

1. Step 1: Write the proportion equation
   98,538.02 : 147,788.58 = 31,978.72 : x
2. Step 2: Convert to fraction form
   98,538.02/147,788.58 = 31,978.72/x
3. Step 3: Cross multiply
   98,538.02x = 147,788.58 × 31,978.72
4. Step 4: Simplify right side
   98,538.02x = 4,726,090,069.51
5. Step 5: Solve for x
   x = 4,726,090,069.51/98,538.02
6. Step 6: Final answer
   x = 47,962.10