Finding the Fourth Proportional to 70,980.30, 106,492.62 and 21,060.63

Step by Step Solution

1. Step 1: Write the proportion equation
   70,980.30 : 106,492.62 = 21,060.63 : x
2. Step 2: Convert to fraction form
   70,980.30/106,492.62 = 21,060.63/x
3. Step 3: Cross multiply
   70,980.30x = 106,492.62 × 21,060.63
4. Step 4: Simplify right side
   70,980.30x = 2,242,801,667.55
5. Step 5: Solve for x
   x = 2,242,801,667.55/70,980.30
6. Step 6: Final answer
   x = 31,597.52