Finding the Fourth Proportional to 156,361,980.72, 215,779,449.52 and 85,798,054.24

Step by Step Solution

1. Step 1: Write the proportion equation
   156,361,980.72 : 215,779,449.52 = 85,798,054.24 : x
2. Step 2: Convert to fraction form
   156,361,980.72/215,779,449.52 = 85,798,054.24/x
3. Step 3: Cross multiply
   156,361,980.72x = 215,779,449.52 × 85,798,054.24
4. Step 4: Simplify right side
   156,361,980.72x = 18,513,456,913,362,100
5. Step 5: Solve for x
   x = 18,513,456,913,362,100/156,361,980.72
6. Step 6: Final answer
   x = 118,401,268.82